Question # 1

A stone is tied to the end of a 20 cm along string is whirled in a horizontal circle.

if centripetal acceleration is 9.8 m/sec², then its angular velocity in rad/sec is:

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22/7

7

14

21

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

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3

24

126

200

Centripetal acceleration is also called ________ acceleration

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Tangential

Radial

Angular

None of these

Direction of motion ______ in circular motion:

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Changes off and on

Changes continuously

Does not change

None of them

Angular momentum is a:

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vector quantity

Imaginary quantity

Complex Quantity

Scalar Quantity

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 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 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

Moment of inertia depends upon:

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Mass

Selection of axis of rotation

Both of them

None of these

One radian is:

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Greater than one degree

Less than one degree

Equal to degree

none of these

Centripetal acceleration is also called _______ acceleration:

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Tangential

Radial

Angular

None of them

Conventionally the angular velocity is directed to 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 the above

______ plays the same role during angular motion as played by the mass in linear motion

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Torque

Angular Momentum

Moment of a force

Moment of inertia

Centripetal acceleration is also called ______ acceleration

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Tangential

Radial

Angular

None of them

One radian is:

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Greater than one degree

Less than one degree

Equal to one degree

None of these

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Physics ECAT Pre Engineering Chapter 5 Circular Motion Online Test MCQs With Answers

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