ECAT Pre General Science Physics Chapter 5 MCQ Test With Answer

Question # 1

A disc rolls down a hill and its speed at bottom is found to be 11.4 m/sec. Height of the hill is then nearly:

10 m A
12 m B
13 m C
15 m D

Question # 2

When a body moves with a constant speed in a circle:

No work is done on it A
No acceleration is produced in the body B
Velocity remains constant C
None of these D

Question # 3

The number of countries who manage the largest satellite system is:

3 A
24 B
126 C
200 D

Question # 4

The net force acting on a 100 kg man standing in an elevator accelerating downward with a = 9.8 m sec^-2comes out to be

980 N A
580 N B
1380 N C
Zero D

Question # 5

One radian is:

Greater than one degree A
Less than one degree B
Equal to one degree C
None of them D

Question # 6

Direction of angular momentum is determined by:

Right hand rule A
Head to tail rule B
Left hand rule C
None of them D

Question # 7

When an object moves with a uniform angular velocity, then its instantaneous angular velocity is equal to:

Zero A
Its average velocity B
Its angular displacement C
None of these D

Question # 8

A car is moves around a circular track of radius 0.3 m at the rate of 120 rev/min. The speed v of the car is:

38 m/sec A
3.8 m/sec B
0.6 m/sec C
None of these D

Question # 9

A toy car moves around a circular track of radius 0.3 m at the rate of 120 rev/min. The speed V of the car is:

38 m/sec A
3.8 m/sec B
0.6 m/sec C
None of these D

Question # 10

One radian is

Greater than one degree A
Less than one degree B
Equal to one degree C
None of these D

Question # 11

When angular acceleration is positive, the body rotates:

Slower A
Slowest B
Faster C
None of these D

Question # 12

If a gymnast sitting on a rotating stool with his arms outstretched, brings his arms towards the chest, then its angular velocity will

Increase A
Decrease B
Remain constant C
None of these D

Question # 13

In case of planets, the necessary acceleration is provided by:

Gravitational force A
Coulomb force B
Frictional force C
None of these D

Question # 14

The useful unit of angular replacement in SI unit is:

Degree A
Revolution B
Radian C
Metre D

Question # 15

A flywheel accelerates from rest to an angular velocity of 7 rad/sec in 7 seconds. Its average acceleration will be:

49 rad/sec² A
1 rad/sec² B
0.16 rev/sec² C
Both A and C D
Both B and C E

Question # 16

Moment of inertia depends upon:

Mass A
Selection of axis of rotation B
Both of them C
None of these D

Question # 17

Direction of motion_______ in circular of motion:

Changes off and on A
Changes continuously B
Does not change C
None of them D

Question # 18

A point on the rim of a wheel moves 0.2 m where the wheel turns through an angle is 14.3 degrees. The radius of the wheel is:

0.05 m A
0.08 m B
0.8 m C
0.008 m D

Question # 19

A flywheel accelerates from rest to an angular velocity of 7 rad/sec in 7 seconds. Its average acceleration will be:

49 rad/sec² A
1 rad/sec² B
0.16 rev/sec² C
Both A and C D
Both B and C E

Question # 20

Satellites are held in orbits around Earth by its:

Gravitational field A
Magnetic field B
Own orbital motion C
Own spin motion D

Question # 21

The rear wheels of an automobile are rotating with an angular velocity of 14 rev/sec which is reduced to 38 rad/sec in 5 second when brakes are applied. Its angular acceleration is:

5 rad/sec² A
-10 rev/sec² B
-10 rad/sec² C
-5 rev/sec² D

Question # 22

A body moving along the circumference of a circle of radius R completes one revolution. The radius of the covered path to the angle subtended at the center is:

Radius of the circle A
Twice the radius B
Thrice the radius C
None of these D

Question # 23

The angular speed of a particle moving along a circular path is 5 Pie rad sec^-1, Its period of motion is:

2.5 sec A
0.06 sec B
15.7 sec C
0.4 sec D

Question # 24

A body moving along the circumference of a circle of radius R completes one revolution. The radius of a covered path to the angle subtended at the centre is:

Radius of the circle A
Twice the radius B
Thrice the radius C
None of these D

Question # 25

When angular acceleration is positive, the body rotates:

Slower A
Slowest B
Faster C
None of these D

Question # 26

One radian is:

Greater than one degree A
Less than one degree B
Equal to one degree C
None of these D

Question # 27

Which of the following pairs does not have identical dimensions?

Torque and energy A
Energy and work B
Momentum and impulse C
Mass and moment of inertia D

Question # 28

Conventionally the angular velocity is directed at an angle of

90° to the axis of rotation A
30° to the axis of rotation B
0° to the axis of rotation C
None of the above D

Question # 29

Centripetal acceleration is also called _______ acceleration:

Tangential A
Radial B
Angular C
None of them D

Question # 30

The instantaneous acceleration of a body moving with constant speed in a circle:

Remains constant A
Is called centripetal acceleration B
Tangential acceleration C
None of these D

Sr.#	Question	Answer
1	Moment of inertia depends upon:	A. Mass B. Selection of axis of rotation C. Both of them D. None of these
2	Which one is related to angular motion:	A. Moment of a force B. Moment of inertia C. Moment of momentum D. None of these
3	In case of planets, the necessary acceleration is provided by:	A. Gravitational force B. Coulomb force C. Frictional force D. None of these
4	Centripetal acceleration is also called _______ acceleration:	A. Tangential B. Radial C. Angular D. None of them
5	One radian is equal to:	A. 30.3° B. 45.3° C. 50.3° D. 57.3°
6	Centripetal acceleration is also called ______ acceleration:	A. Tangential B. Radial C. Angular D. None of them
7	The useful unit of angular replacement in SI unit is:	A. Degree B. Revolution C. Radian D. Metre
8	The useful unit of the angular displacement in SI unit is:	A. Degree B. Revolution C. Radian D. Metre
9	A stone tied to the end of a 20 cm long string is whirled in a horizontal circle. If centripetal acceleration is 9.8 m/sec², then its angular velocity is rad/sec is:	A. 22/7 B. 7 C. 14 D. 21
10	When angular acceleration is positive, the body rotates:	A. Slower B. Slowest C. Faster D. None of these

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ECAT Pre General Science Physics Chapter 5 MCQ Test With Answer

MCQ's Test For ECAT Pre General Science Physics Chapter 5 Circular Motion

ECAT Pre General Science Physics Chapter 5 Circular Motion

A disc rolls down a hill and its speed at bottom is found to be 11.4 m/sec. Height of the hill is then nearly:

When a body moves with a constant speed in a circle:

The number of countries who manage the largest satellite system is:

The net force acting on a 100 kg man standing in an elevator accelerating downward with a = 9.8 m sec-2comes out to be

One radian is:

Direction of angular momentum is determined by:

When an object moves with a uniform angular velocity, then its instantaneous angular velocity is equal to:

A car is moves around a circular track of radius 0.3 m at the rate of 120 rev/min. The speed v of the car is:

A toy car moves around a circular track of radius 0.3 m at the rate of 120 rev/min. The speed V of the car is:

One radian is

When angular acceleration is positive, the body rotates:

If a gymnast sitting on a rotating stool with his arms outstretched, brings his arms towards the chest, then its angular velocity will

In case of planets, the necessary acceleration is provided by:

The useful unit of angular replacement in SI unit is:

A flywheel accelerates from rest to an angular velocity of 7 rad/sec in 7 seconds. Its average acceleration will be:

Moment of inertia depends upon:

Direction of motion_______ in circular of motion:

A point on the rim of a wheel moves 0.2 m where the wheel turns through an angle is 14.3 degrees. The radius of the wheel is:

A flywheel accelerates from rest to an angular velocity of 7 rad/sec in 7 seconds. Its average acceleration will be:

Satellites are held in orbits around Earth by its:

The rear wheels of an automobile are rotating with an angular velocity of 14 rev/sec which is reduced to 38 rad/sec in 5 second when brakes are applied. Its angular acceleration is:

A body moving along the circumference of a circle of radius R completes one revolution. The radius of the covered path to the angle subtended at the center is:

The angular speed of a particle moving along a circular path is 5 Pie rad sec-1, Its period of motion is:

A body moving along the circumference of a circle of radius R completes one revolution. The radius of a covered path to the angle subtended at the centre is:

When angular acceleration is positive, the body rotates:

One radian is:

Which of the following pairs does not have identical dimensions?

Conventionally the angular velocity is directed at an angle of

Centripetal acceleration is also called _______ acceleration:

The instantaneous acceleration of a body moving with constant speed in a circle:

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The net force acting on a 100 kg man standing in an elevator accelerating downward with a = 9.8 m sec^-2comes out to be

The angular speed of a particle moving along a circular path is 5 Pie rad sec^-1, Its period of motion is: