FSC Physics MCQs Chapter 5 Class 11

Created on February 07, 2022

Physics Ch 5 Class 11 Circular Motion and Momentum

1 / 95

A body moving with an angular velocity of 1 rev/sec has a frequency of:

0.5 Hz

2 Hz

1 Hz

None of these

2 / 95

An object whose mass is 100 g starts from rest and moves with constant acceleration of 20 cm / s2. At the end of 8s its momentum is ________ in g cm / s.

NTS 2016 DUHS & JSMU
Physics
Circular Motion and Momentum
Elimination Tool:

A) 500

B) 8000

C) 16000

D) 33000

3 / 95

The mass of earth on the basis of Newton’s Law of Gravitation is given by:

NTS 2012
Physics
Gravitation
Elimination Tool:

A) M = 9.1 x 10-31 kg

B) M = 1.6027 x 10-27 kg

C) M = 5.98 x 1024 kg

D) M = 6.02 x 1023 kg

4 / 95

The moment of inertia of a solid sphere of mass ‘m’ having radius ‘r’ about a line passing through its center is:

NUMS 2019 Cancelled
Physics
Circular Motion and Momentum
Elimination Tool:

A) 5/2 mr2

B) 2/5 mr2

C) 1/2 mr2

D) 1/3 mr2

5 / 95

Example(s) of spin motion is/are:

NTS 2011
Physics
Circular Motion and Momentum
Elimination Tool:

A) the daily rotation of the earth about its own axis

B) jumping of a paratrooper from an helicopter

C) flow of a viscous liquid

D) rotation of flywheel about its axle

E) Both the daily rotation of the earth and flywheel about its own axis

6 / 95

Two spherical balls of 2.0 kg and 3.0 kg masses are moving towards each other with velocities of 6 m/s and 4 m/s respectively. What must be the velocity of the smaller ball after the collision, if the velocity of the bigger ball is 3 m/s?

NTS 2015 DUHS and JSMU
Physics
Circular Motion and Momentum
Elimination Tool:

A) 1.5 m/s

B) 2.5 m/s

C) 3.5 m/s

D) 4.5 m/s

7 / 95

Under what condition an object will have zero displacement but non zero distance?

PMC 2020
Physics
Circular Motion and Momentum
Elimination Tool:

A) Linear motion

B) Circular motion

C) Random motion

D) Oscillation

8 / 95

A particle is moving in a circle with radius r and velocity v if radius is doubled keeping the velocity constant, the value of tangential acceleration will be:

Doubled

Quadrupled

Halved

Same

9 / 95

Artificial gravity can be supplied by which of the following ways so that normal force of gravity can be generated for the astronaut:

NTS 2011
Physics
Gravitation
Elimination Tool:

A) rotating the space craft

B) back and forth motion spacecraft

C) up and down movement of spacecraft

D) keeping the space craft stationary

10 / 95

What is the unit of angular momentum

J

Js

Js-1

Js-2

11 / 95

If the diameter of the earth becomes two times its present value and its mass remains unchanged, then how would the weight of an object on the surface of the earth be affected?

NTS 2014
Physics
Gravitation
Elimination Tool:

A) Becomes double

B) Becomes one fourth

C) Becomes one third

D) Remains same

12 / 95

The angular measurement is known as _____ measurement

PMC Sample 1
Physics
Circular Motion and Momentum
Elimination Tool:

A) parameter

B) area

C) circumfrence

D) all of these

13 / 95

The earth rotates on its axis once a day. Suppose, by some process the earth contracts so that it’s radius is only half as large as at present, then how long the earth will take to complete it’s rotation?

PMC 2020
Physics
Circular Motion and Momentum
Elimination Tool:

A) 24 hours

B) 18 hours

C) 6 hours

D) 12 hours

14 / 95

Mass of a person is 50 kg. The apparent weight of the person in elevator is double of his real weight. Find the acceleration of the elevator. Consider g = 10 m/s2

15 m/s2 upward

15 m/s2 downward

10 m/s2 upward

10 m/s2 downward

15 / 95

Moment of inertia of a sphere is:

1/2 mL^2

mr2

1/2 mr2

2/5 mr2

16 / 95

The number of revolutions In 3p1 radians

2

3

3/2

1/2

17 / 95

A jeep travelling at a constant speed of 108 km/hr rounds a curve of radius 100 m. Find its acceleration.

NTS 2015 SMBBMC
Physics
Circular Motion and Momentum
Elimination Tool:

B) 6 m/s2

C) 7 m/s2

D) 8 m/s2

E) 9m/s2

18 / 95

The radius of the moon is 27% off the earth’s radius and its mass is 1.2% of the earth’s mass. Find the acceleration due to gravity on the surface of the moon:

NTS 2010
Physics
Gravitation
Elimination Tool:

A) 0.431 m/s2

B) 1.615 m/s2

C) 2.431 m/s2

D) 3.615 m/s2

19 / 95

A stone attached to a rope which is whirled in a circle. If the rope breaks during the motion, the stone will move:

Radially inwards

Radially outwards

Along tangent

Along circle

20 / 95

The centripetal acceleration formula is given as:

PMC Sample 1
Physics
Circular Motion and Momentum
Elimination Tool:

A) V/r

B) r/V

C) ma

D) None of these options are correct

21 / 95

A handball is tossed vertically upward with a velocity of 19.6 m/s. Approximately how high will it rise?

NTS 2016 DUHS & JSMU
Physics
Circular Motion and Momentum
Elimination Tool:

A) 15.8 m

B) 19.6 m

C) 25.6 m

D) 30 m

22 / 95

The nature of the force of gravitation in the universe is:

NTS 2016 SMBBMC
Physics
Gravitation
Elimination Tool:

A) Repulsive only

B) Attractive only

C) Electric

D) Magnetic

23 / 95

A 400 gram ball is tied to the end of a cord and whirled in à horizontal circle of radius 0.6 m. If the ball makes five complete revolutions in 2 s, what is the ball’s linear speed?

NTS 2016 DUHS & JSMU
Physics
Circular Motion and Momentum
Elimination Tool:

B) 5.42 m/s2

C) 7.42 m/s2

D) 8.42 m/s2

E) 9.42 m/s2

24 / 95

Centrifugal force Is:

Pseudo force

Action force

Both a and b

None of these

25 / 95

Moment of inertia in angular motion plays the same role as

Mass in linear motion

Acceleration in linear motion

Rest mass

None of these

26 / 95

A 800 kg car is turning round a corner at 6 m/sec as it travels along an arc of circle of radius 12 m. The magnitude of force exerted by pavement on the tyres to hold the car in circular path is _________.

NUMS 2019 Reconduct
Physics
Circular Motion and Momentum
Elimination Tool:

A) 2400 N

B) 1200 N

C) 400 N

D) 4800 N

27 / 95

A 1000 kg vehicle is turning around a corner at 10 m/s as it travels along an arc of a circle. If the radius of the circular path is 10 m, how large a force must be exerted by the pavement on the tires to hold the vehicle in the circular path?

NTS 2015 DUHS and JSMU
Physics
Circular Motion and Momentum
Elimination Tool:

A) 1.0 x 104N

B) 3.0 x 104N

C) 5.0 x 104N

D) 7.0 x 104N

28 / 95

A very large star of mass M and radius r undergoes a transformation into a neutron star. Assume that the mass remains constant while the radius of the star becomes 1/1,000 its original size, (1 × 10−3)r. How does the change in the radius of the star affect the force of gravity, Fg, acting between the star and a planet that is orbiting the star?

NUMS 2014
Physics
Gravitation
Elimination Tool:

A) The force of gravity between the planet and the star remains unchanged.

B) The new force of gravity between the star and the planet is (1 × 10−3)Fg.

C) The new force of gravity between the star and the planet is (1 × 10−3)Fg.

D) The new force of gravity between the star and the planet is (1 × 10−9)Fg.

29 / 95

For a satellite so that it could stay over the same point on Earth’s surface the orbital radius r is given by ________.

NUMS 2019 Reconduct
Physics
Gravitation
Elimination Tool:

A) r2= GMT2/ 4×2

B) r2= [GMT2/ 4×2]1/3

C) r = [GMT2/ 4×2]1/3

D) r = [GMT / 4×2 ] 1/3

30 / 95

Unit of Angular Momentum? a) Kg m2 s’1b) c) Js-1 d) Both a and b

Kg m2 s-1

Js

Js-1

Both a and b

31 / 95

What will be the velocity of a body revolving In a circle of radius 2m with an angular velocity of 1 rev/sec?

1/2 m/s

1 m/s

2 m/s

None of these

32 / 95

If the body is rotating with uniform angular velocity, then its torque is:

NUMS 2016
Physics
Circular Motion and Momentum
Elimination Tool:

A) Zero

B) 90

C) 1

D) -1

33 / 95

The physical quantity which produces angular acceleration in the body is

NUMS 2014
Physics
Circular Motion and Momentum
Elimination Tool:

A) Force

B) Moment of inertia

C) Impulse

D) Torque

34 / 95

If momentum is increased by 20% then K.E. increases by :

PMC Sample 2
Physics
Circular Motion and Momentum
Elimination Tool:

A) 0.44

B) 0.55

C) 0.66

D) 0.77

35 / 95

What will be the gravitational force of attraction between two balls each weighing 5 kg when placed at a distance of 0.33 m apart. (G = 6.673 x 10-7 Nm2/kg2)

NTS 2015 DUHS and JSMU
Physics
Gravitation
Elimination Tool:

B) 7.1 x 10-8N

C) 6.1 x 10-8 N

D) 3.5 x 10-8 N

E) 1.5 x 10-8 N

36 / 95

The newton-second is the unit of:

PMC 2020
Physics
Circular Motion and Momentum
Elimination Tool:

A) Work

B) Power

C) Impulse

D) Momentum

37 / 95

A body moves on a circular path subtending an angle of 2 radians at the center of a circle of radius 3.5 meters. The linear displacement of the body is _________.

NUMS 2019 Reconduct
Physics
Circular Motion and Momentum
Elimination Tool:

A) 6.5 m

B) 7.0 m

C) 7.5 m

D) 1.75 m

38 / 95

Centrifugal force of a body depends upon?

Weight

Mass

Volume

None of these

39 / 95

If M and m represent the mass of Earth and mass of a satellite respectively; then the orbital speed v of satellite in a circular orbit of radius r around Earth will be:

NUMS 2019 Cancelled
Physics
Gravitation
Elimination Tool:

A) v2= GM/r

B) v2=√GM/r

C) v2= √r/GM

D) v2= √2GM/r

40 / 95

1 radian = _____ degrees.

NTS 2012
Physics
Circular Motion and Momentum
Elimination Tool:

A) 360

B) 180

C) 100

D) 57.3

41 / 95

Initial velocity of the object with which it goes out of the Earth’s gravitational field, is called:

NUMS 2020
Physics
Gravitation
Elimination Tool:

A) Escape velocity

B) Threshold velocity

C) Maximum velocity

D) Terminal velocity

42 / 95

A body is moving in a circle at constant speed. Which statement is true?

PMC Sample 1
Physics
Circular Motion and Momentum
Elimination Tool:

A) The resultant force acts towards the centre of the circle

B) There is no resultant force

C) The resultant force acts away from the centre of the circle

D) None of these options are correct

43 / 95

1 degree Is equal to radians

180

3.14

0.01745

45

44 / 95

An electron describes a circular orbit of radius 2 cm in a uniform magnetic field. If the speed of the electron is doubled then the radius of the orbit will be:

NUMS 2015
Physics
Circular Motion and Momentum
Elimination Tool:

A) 0.5 cm

B) 1 cm

C) 2 cm

D) 4 cm

45 / 95

A disc, a hoop, and a sphere of the same mass and radius are rolled down from a frictionless, inclined plane. Which has a greater speed on reaching the ground?

NUMS 2019 Cancelled
Physics
Circular Motion and Momentum
Elimination Tool:

A) Disc

B) Loop

C) Sphere

D) All have the same speed

46 / 95

Law of conservation of momentum states that:

I. there is no external force applied to a system, then the total momentum of that system remains constant

II. if there is an external force applied to a system, then the total momentum of that system remains constant

III. if there is no external force applied to a system, then the total momentum of that system keeps changing

NTS 2011
Physics
Circular Motion and Momentum
Elimination Tool:

A) I only

B) I and II only

C) I and III only

D) III only

47 / 95

A 100 kg golf ball is moving to the right with a velocity of 20 m/s. It makes a head on collision with an 8 kg steel ball, initially at rest. The two balls get stuck together. What will the velocity of these two balls after collision?

NTS 2015 DUHS and JSMU
Physics
Circular Motion and Momentum
Elimination Tool:

A) 14.3 m/s

B) 17.5 m/s

C) 18.5 m/s

D) 19.7 m/s

48 / 95

What is the work done by a body moving with 1 m/s velocity in circular orbit of radius 10m?

10

100

5

Zero

49 / 95

When the aircraft Concorde is moving in a horizontal plane at a constant speed of 650 ms-1, its turning circle has a radius of 80 km. What is the ratio of the centripetal force to the weight of the aircraft? (g = 9.8 m/s2)

NTS 2013
Physics
Circular Motion and Momentum
Elimination Tool:

A) 8.3 x 10^4

B) 0.54

C) 1.9

D) 52

50 / 95

Two spheres of the same size, one of mass 5 kg and the other of mass 50 g are dropped simultaneously from a tower. When they are about to touch the ground, they have the same:

NUMS 2015
Physics
Gravitation
Elimination Tool:

A) Kinetic Energy

B) Potential Energy

C) Momentum

D) Acceleration

51 / 95

In rotation motion the torque is:

Rate of change of angular momentum

Rate of change of linear momentum

Rate of change of inertia

Rate of change of centripetal force

52 / 95

A particle is moving in a uniform circular path. If its mass is reduced to half of its original mass, the force acting upon it will be?

Half

Doubled

Remain Same

None of these

53 / 95

The angular velocity of a rotating disk increases from 2 rad/s to 5 rad/s in 0.5s. What is the disk’s average angular acceleration?

NTS 2015 SMBBMC
Physics
Circular Motion and Momentum
Elimination Tool:

B) 46 rad/s2

C) 36 rad/s2

D) 16 rad/s2

E) 6 rad/s2

54 / 95

Compute the gravitational force of attraction between two balls each weighing 10 kg when placed at a distance of 1 metre apart.

NTS 2015 SMBBMC
Physics
Gravitation
Elimination Tool:

A) 66 x 10 -2 N

B) 77 x 10 -7 N

C) 81.9 x 10 -7 N

E) 667.3 x 10-11 N

55 / 95

In rotational motion, angular momentum plays a role which is analogous to that played by _____ in linear motion.

NUMS 2017
Physics
Circular Motion and Momentum
Elimination Tool:

A) Linear velocity

B) Linear momentum

C) Linear acceleration

D) Inertia

56 / 95

S.I. Unit of universal gravitational constant G is:

NUMS 2016
Physics
Gravitation
Elimination Tool:

A) Nm2/kg

B) Nm2/kg2

C) Nm/kg2

D) Nm/kg

57 / 95

Find the gravitational force of attraction between two balls each weighing 10 kg, when placed at a distance of 1 meter apart.

NTS 2016 DUHS & JSMU
Physics
Gravitation
Elimination Tool:

A) 6.673×10-9 N

B) 7.71×10-9 N

C) 8.91×10-9 N

D) 9.91×10-9 N

58 / 95

A moon of mass ‘m’ orbits a planet of mass 100 m. Let the strength of the gravitational force exerted by the planet on the moon be denoted by F1 , and let the strength of the gravitational force exerted by the moon on the planet be F2 . Which of the following is true?

NTS 2014
Physics
Gravitation
Elimination Tool:

B) F1 is ten times smaller than F2

C) F2 is ten times greater than F1

D) F2 is ten times smaller than F1

E) F1 is equal to F2

59 / 95

A ball moving horizontally with speed ‘v’ strikes the bob of a simple pendulum at rest. The mass of the bob is equal to that of the ball if the collision is elastic the bob will rise to a height:

NTS 2010
Physics
Circular Motion and Momentum
Elimination Tool:

A) v2/g

B) v2/2g

C) v2/4g

D) v2/8g

60 / 95

A body having translatory motion possesses _____ and _____. In the same way a body having rotatory motion possesses _______ and _______.

NTS 2015 SMBBMC
Physics
Circular Motion and Momentum
Elimination Tool:

A) Angular momentum… Angular velocity…. Linear momentum….Linear velocity

B) Linear velocity…linear momentum…. Angular velocity…. angular momentum

C) Linear momentum…. angular momentum…… linear velocity…. angular velocity

D) Angular velocity…. angular momentum….. linear momentum….. linear velocity

61 / 95

A square coil of 16 cm has 200 turns and rotates in a uniform magnetic field of magnitude 0.05 T. If the peak emf is 12 V, what is the angular velocity of the coil?

NUMS 2015
Physics
Circular Motion and Momentum
Elimination Tool:

A) 47 rad s-1

B) 49 rad s-1

C) 43 rad s-1

D) 45 rad s-1

62 / 95

When brakes of a car are applied, angular velocity of a flywheel reduces from 900 cycle / min to 720 cycle / min in 6 sec. Angular retardation is:

NUMS 2015
Physics
Circular Motion and Momentum
Elimination Tool:

A) ? rad/s2

B) 9 ? rad/s2

C) 8 ? rad/s2

D) ⅔ ?rad / s2

63 / 95

What is 1 radian in degrees approximately?

PMC Sample 1
Physics
Circular Motion and Momentum
Elimination Tool:

A) 57.3˚

B) 360˚

C) π degrees

D) π2 degrees

64 / 95

1 radian is equal to:

PMC 2020
Physics
Circular Motion and Momentum
Elimination Tool:

A) 57.1 degrees

B) 57.2 degrees

C) 57.3 degrees

D) 57.4 degrees

65 / 95

Moment of inertia of a thin rod of mass m, length l about a line passing through its center is:

NUMS 2019 Cancelled
Physics
Circular Motion and Momentum
Elimination Tool:

B) ½ ml2

C) ⅓ ml2

D) ⅖ ml2

E) 1/12 ml2

66 / 95

A car going around a certain curve at a speed of 25 km/h has a centripetal force acting on it of 100 N. If the speed of the car is doubled, the centripetal force:

NTS 2016 DUHS & JSMU
Physics
Circular Motion and Momentum
Elimination Tool:

A) Is quadrupled

B) Is doubled

C) Is multiplied by the√2

D) Is reduced to ½ of the original value

67 / 95

What is angular velocity?

PMC Sample 1
Physics
Circular Motion and Momentum
Elimination Tool:

A) Change in angular rotation / change in time

B) Change in displacement / change in time

C) Change in speed / change in time

D) Change in acceleration / change in time

68 / 95

When speed is doubled the centripetal force will be?

Same

Doubled

Tripled

Quadrupled

69 / 95

the period of rotation of geosynchronous satellite is

1 day

1 month

1 year

1.5 year

70 / 95

If during circular motion, tangential velocity of a body becomes double, then centripetal force becomes:

PMC 2020
Physics
Circular Motion and Momentum
Elimination Tool:

A) Double

B) One half

C) Four times

D) One fourth

71 / 95

A disc, a hoop, and a sphere of the same mass and radius are rolled down from a frictionless, inclined plane. Which has a greater speed on reaching the ground?

NUMS 2015
Physics
Circular Motion and Momentum
Elimination Tool:

A) Disc

B) Loop

C) Sphere

D) All have the same speed

72 / 95

The centripetal acceleration is maximum when radius r is:

PMC Sample 1
Physics
Circular Motion and Momentum
Elimination Tool:

A) Increasing

B) Decreasing

C) Constant

D) None of these options are correct

73 / 95

The rate of change of angular velocity with respect to _____ defines angular acceleration.

NTS 2015 SMBBMC
Physics
Circular Motion and Momentum
Elimination Tool:

A) Speed

B) Frequency

C) Distance

D) Time

74 / 95

A bicycle wheel of radius 0.70 m is turning at an angular speed of 6.3 rad/s as it rolls on a horizontal surface without slipping. What is the linear speed of the wheel?

1.4 m/s

0.11 m/s

28 m/s

4.4 m/s

75 / 95

Apparent weight of a body In an elevator accelerating downwards is given by

m (g + a)

ma

Zero

m (g — a)

76 / 95

On the ground, the gravitational force on a satellite is W. What is the gravitational force on the satellite when at a height R/50, where R is the radius of the Earth?

NTS 2013
Physics
Gravitation
Elimination Tool:

A) 1.04 W

B) 1.02 W

C) 0.98 W

D) 0.96 W

77 / 95

A guy is standing in a lift falling freely under gravity and releases a ball from hand. As seen by the ball, the boy:

NUMS 2017
Physics
Gravitation
Elimination Tool:

A) Falls down

B) Remains stationary

C) Goes up

D) None of above

78 / 95

If a wheel of radius r turns through an angle of 30°, then the distance through which any point on its rim moves is?

PMC Sample 1
Physics
Circular Motion and Momentum
Elimination Tool:

A) r(π/3)

B) r(π/6)

C) r(π/30)

D) r(π/180)

79 / 95

In motion of satellites, necessary centripetal force is provided by:

NUMS 2020
Physics
Circular Motion and Momentum
Elimination Tool:

A) Gravitational Force

B) Coulomb’s Force

C) Magnetic Force

D) Nuclear Force

80 / 95

One complete circle is equal to:

NUMS 2020
Physics
Circular Motion and Momentum
Elimination Tool:

A) 2 radian

B) 3 radian

C) 5 radian

D) 6 radian

81 / 95

The ratio of angular speed of moon around the Earth to its angular speed about its own axis is:

NUMS 2015
Physics
Circular Motion and Momentum
Elimination Tool:

A) 2:1

B) 1:6

C) 1:30

D) 1:1

82 / 95

A bomber drops a bomb when it is vertically above the target. It misses the target because of the:

NUMS 2014
Physics
Gravitation
Elimination Tool:

A) Vertical component of the velocity of bomber

B) Force of gravity

C) Acceleration of the bomber

D) Horizontal component of the velocity of bomber

83 / 95

Js is the unit of:

linear momentum

Angular momentum

Energy

Mass

84 / 95

The velocity of a disc at the bottom of an inclined plane is?

√gh

√4gh/3

√3gh/4

√5gh/6

85 / 95

On doubling the mass, the linear momentum and angular momentum of the body will be:

Remain same

Increased

Decreased

Doubled

86 / 95

A rotating wheel of radius 0.5 m has an angular velocity of 5 rad/s at some instant and 10 rad / s after 5 s. Find the angular acceleration of a point on its rim.

NTS 2013
Physics
Circular Motion and Momentum
Elimination Tool:

A) 1 rad / s2

B) 3 rad / s2

C) 5rad / s2

D) 7rad / s2

87 / 95

A car 500 kg is travelling at a constant speed of 9 m/s round a curve of 100m. What is the centripetal force?

NTS 2019
Physics
Circular Motion and Momentum
Elimination Tool:

A) 205N

B) 305N

C) 405N

D) 505N

88 / 95

A body is hanging from a rigid support by an extensible string of length L. It is struck inelastically by an identical body of mass m with horizontal velocity v =√2gl , the tension in the string increases just after striking by:

NTS 2019
Physics
Circular Motion and Momentum
Elimination Tool:

A) mg

B) 3mg

C) 2mg

D) None of these

89 / 95

A solar day is the time interval between two successive appearances of the sun overhead. The time that is referred to the rotation of the earth about its axis is called:

NTS 2018
Physics
Gravitation
Elimination Tool:

A) Universal Time

B) Length of the day

C) Time interval

D) Solar day

90 / 95

Angular velocity is measured in

rad/min

m/s

angle/s

None of the above

91 / 95

The torque will be greater if:

NTS 2011
Physics
Circular Motion and Momentum
Elimination Tool:

A) both magnitude of force and moment arm are smaller

B) both magnitude of force and moment arm are greater

C) only magnitude of force is greater

D) only moment arm is greater

92 / 95

A particle moving along a circular path of radius 5m and with uniform speed 5 m/s. What will be the average acceleration when the particle completes half revolution?

10 pi

5/pi

10/pi

Zero

93 / 95

One wheel has a diameter of 30 inches and a second wheel has a diameter of 20 inches. The first wheel travels a certain distance revolution in 240 revolutions. In how many revolutions did the second wheel travel the same distance.

NUMS 2017
Physics
Circular Motion and Momentum
Elimination Tool:

A) 170

B) 160

C) 360

D) 420

94 / 95

When a body moves in the direction of gravitational force i.e. towards the earth, the work is done by the force of gravity on the body and is ______, whereas when the body moves against the direction of gravitational force, the corresponding work done is ______.

NTS 2014
Physics
Gravitation
Elimination Tool:

A) negative … positive

B) positive… negative

C) positive … positive

D) negative … negative

95 / 95

If the actual weight of a person standing in an elevator is 75N, and the apparent weight in the accelerated elevator is 105N, find the acceleration and direction of elevator motion. (Use g 10 m/s2)

4 m/s2 downwards

4 m/s2 upwards

6 m/s2 downwards

6 m/s2 upwards

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