ECAT Pre Computer Science Chapter 5 MCQ Test With Answer

MCQ's Test For ECAT Physics Chapter 5 Circular Motion

Try The MCQ's Test For ECAT Physics Chapter 5 Circular Motion

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ECAT Physics Chapter 5 Circular Motion

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Question # 1

Formula for calculating moment of inertia of the bodies of one pair is same. Tick the answer.

Question # 2

When body moves along a circular path with constant speed, it has an acceleration, which is always directed;

Question # 3

Moment of inertia depends upon:

Question # 4

Centripetal acceleration is also called ______ acceleration

Question # 5

The useful unit of the angular displacement in SI unit is:

Question # 6

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

Question # 7

Final velocity of a hoop is __________ the final velocity of a disc having same mass and radius on coming down an inclined plane.

Question # 8

Direction of motion_______ in circular of motion:

Question # 9

When angular acceleration is positive, the body rotates:

Question # 10

One radian is

Question # 11

Centripetal acceleration is also called ______ acceleration:

Question # 12

Radian is defined as the angle subtended at the center of a circle by an arc of:

Question # 13

Which of the following pairs does not have identical dimensions?

Question # 14

A car is turning around a corner at 10 m/sec as it travels along an arc of a circle. If value of centripetal acceleration is 10 m/sec2in this case, find radius of the circular path:

Question # 15

Satellites are held in orbits around Earth by its:

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ECAT Physics Chapter 5 Important MCQ's

Sr.# Question Answer
1 When an object moves with a uniform angular velocity, then its instantaneous angular velocity is equal to:
A. Zero
B. Its average velocity
C. Its angular displacement
D. None of these
2 An axis of rotation
A. Is a straight line
B. Is normal to the plane of rotation
C. Passes through pivot point O
D. All of them
3 Direction of angular momentum is determined by:
A. Right hand rule
B. Head to tail rule
C. Left hand rule
D. None of them
4 Centripetal acceleration is also called ________ acceleration
A. Tangential
B. Radial
C. Angular
D. None of these
5 Circular motion is an example of motion in:
A. One dimension
B. Two dimensions
C. Three dimensions
D. None of these
6 ______ plays the same role during angular motion as played by the mass in linear motion
A. Torque
B. Angular Momentum
C. Moment of a force
D. Moment of inertia
7 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:
A. 38 m/sec
B. 3.8 m/sec
C. 0.6 m/sec
D. None of these
8 Einstein's theory about gravity if better than Newton's because it gave explanation of:
A. Inverse square law
B. Bending of light
C. Both A and B
D. None of above
9 Which of the following pairs does not have identical dimensions?
A. Torque and energy
B. Energy and work
C. Momentum and impulse
D. Mass and moment of inertia
10 A rotating wheel accelerates up to the value of 0.75 rev/sec2after 2 seconds of its start. Its angular velocity becomes:
A. 9.42 rad/sec
B. 2.6 rev/sec
C. 1.5 rev/sec
D. Both A and C

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