Question # 1

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

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Along the tangent

Towards the centre

Away from the centre

None of them

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

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Gravitational force

Coulomb force

Frictional force

None of these

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:

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0.05 m

0.08 m

0.8 m

0.008 m

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:

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38 m/sec

3.8 m/sec

0.6 m/sec

None of these

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:

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1 m

5 m

10 m

15 m

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:

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Radius of the circle

Twice the radius

Thrice the radius

None of these

Moment of inertia depends upon:

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Mass

Selection of axis of rotation

Both of them

None of these

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

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1 m

5 m

10 m

15 m

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:

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10 m

12 m

13 m

15 m

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

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Disc, sphere

sphere, hoop

Thin rod, hoop

Hoop,disc

Direction of motion _______ in circular motion

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Changes off and on

Changes continuously

Does not change

None of them

Which one is related to angular motion:

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Moment of a force

Moment of inertia

Moment of momentum

None of these

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

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49 rad/sec²

1 rad/sec²

0.16 rev/sec²

Both A and C

Both B and C

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

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3

24

126

200

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

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0.05 m

0.08 m

0.8 m

0.008 m

Conventional the angular Velocity is Directed at an angle of:

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90° to the axis of rotation

30° to the axis of rotation

0° to the axis of rotation

None of above

One radian is

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Greater than one degree

Less than one degree

Equal to one degree

None of these

Direction of angular momentum is determined by:

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Right hand rule

Head to tail rule

Left hand rule

None of them

Direction of motion _________ in circular motion

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Changes off and on

Changes continously

Does not change

None of them

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ECAT Physics Chapter 5 Circular Motion Online Test MCQs With Answers

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