Question # 1

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

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Maximum

Minimum

Zero

Negative

Work has the dimension as that of:

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Torque

Angular momentum

Linear momentum

Power

When a force of 0.5 N displaces a body through a distance of 2m in the direction of force, the work done is:

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0.5 J

2 J

0.25 J

1 J

When velocity of moving body is doubled, the quantity which is also doubled is its:

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K.E.

Acceleration

Momentum

P.E.

A 2 kg block is held 1 m above floor for 50 seconds. The work done is:

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Zero

10.2 J

100 J

980 J

When the body is moves against the force of friction on a horizontal plane, the work done by the body is:

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Positive

Negative

Zero

None of these

Work is product of:

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Force and velocity

Heat and energy

Force and displacement

None of these

The types of mechanical energy is/are:

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Kinetic energy

Potential energy

Both of these

None of these

The unit of work in CGS system is

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Joule

Erg

Dyne

Watt

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

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0°

90°

180°

None of these

Power is a :

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Vector quantity

Base quantity

Scalar quantity

None of these

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°

Work is a always done on a body when

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A force acts on it

It moves through certain distance

None of A or B is correct

Both A and B are correct

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 or B is correct

Both A and B is correct

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

Work-energy principle states that work done on the body by applied force is equal to change in:

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Potential energy

Kinetic nergy

Linear momentum

None of these

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

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