Question # 1

Work done is lowering the bucket into the well is:

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Zero

Positive

Negative

None of these

Work done on a body by gravity in lifting it up to certain height is

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Maximum

Minimum

Zero

Negative

A body moves a distance of 10 m along a straight line under the action of a force of 5 N and work done in 25J. The angle which the force makes with the direction of motion will be

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60°

90°

30°

0°

Work is always done on a body when:

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A force acts on it

It moves through certain distance

None of A and B is correct

Both A and B is correct

Work has the dimension as that of:

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Torque

Angular momentum

Linear momentum

Power

Work is a

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Scalar quantity

Vector quantity

Base quantity

None of these

The commercial unit of electrical energy is :

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K Watt

KWH

Horse power

Joule

When a falling body hits ground, its KE changes to _____ energy.

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Potential

Chemical

Mechanical

sound and heat

Work has the dimensions as that of

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Torque

Angular momentum

Linear momentum

Power

Work done by the force of friction is always

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Positive

Zero

Negative

Maximum

Work done is maximum when angle between force and displacement is:

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0°

90°

180°

None of these

The work performed on an object does not depend on:

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Force applied

Angle at which force is inclined to the displacement

Initial velocity of the object

Displacement

A body moves a distance of 10 m among a straight line under the action of a force of 5 N. If the work done is 25 J, the angle which the force makes with the direction of motion of a body is:

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0°

30°

60°

90°

A labourer carrying a distance a load on his head moves from rest on a horizontal road to another point where he comes to rest. He has done:`

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Minimum work

Maximum work

Zero work

Negative work

The space around the earth in which its gravitational force acts on a body is called

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Electric Field

Gravitational field

Magnetic field

Conservative field

Work is product of:

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Force and velocity

Heat and energy

Force and displacement

None of these

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Physics ECAT Pre Engineering Chapter 4 Work and Energy Online Test MCQs With Answers

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