Question # 1

One radian is:

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Greater than one degree

Less than one degree

Equal to degree

none of these

Angular velocity is a:

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Scalar quantity

Vector quantity

Complex quantity

None of these

In rotational motion, analogue of force F us called:

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Couple

Torque

Mass

Moment of intertia

Centripetal acceleration is also called ________ acceleration

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Tangential

Radial

Angular

None of these

Satellites are held in orbits around Earth by its:

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Gravitational field

Magnetic field

Own orbital motion

Own spin motion

Angular velocity is a:

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Scalar quantity

Vector quantity

Complex quantity

None of these

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

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Along the tangent

Toward the centre

Away from the centre

None of them

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

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Length equal to its diameter

Length equal to its radius

Any length

None of these

The net force acting on a 100 kg man standing in an elevator accelerating downward with a = 0.8 m sec^-2comes out to:

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980 N

580 N

1380 N

Zero

An axis of rotation

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Is a straight line

Is normal to the plane of rotation

Passes through pivot point O

All of them

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:

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Radius of the circle

Twice the radius

Thrice the radius

None of these

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

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980 N

580 N

1380 N

Zero

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

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Zero

Its average velocity

Its angular displacement

None of these

One radian is equal to:

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30.3°

45.3°

50.3°

57.3°

Direction of motion _________ in circular motion

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Changes off and on

Changes continously

Does not change

None of them

The number of "Earth stations" which transmit signals to satellites and receive signals from them are:

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3

24

126

200

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

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