Question # 1

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

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

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

The commercial unit of electrical energy is :

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K Watt

KWH

Horse power

Joule

The value of escape velocity of Earth planet comes out to be:

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11 m/sec

11 km/sec

11 km/hour

11 cm/sec

Tick the conservation force:

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Tension in a string

Air resistance force

Elastic spring

Frictional force

A 100 kg car is moving at a speed of 10 m/sec and comes to rest after covering a distance of 50 m. the amount of work done against friction is:

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+5 x 10¹J

+5 x 10²J

+5 x 10³J

+5 x 10⁴J

The tidal energy is produced due to rotation of Earth relative to:

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Moon

Sun

Oceans

Water

A field in which the work done is moving a body along closed path is zero is called:

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Nuclear filed

Conservative field

Gravitational field

Non-conservative field

Work done along a closed path in a gravitational field is:

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Maximum

Minimum

Zero

Unity

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

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0°

30°

60°

90°

Most of the geysers occur in:

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Volcanic regions

Magnetic regions

Northern region

None of these

The total work done in moving the body up and then down through the same height in a gravitational field is equal to:

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mgh

Its wight

Weight X height

Zero

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

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0°

90°

180°

None of these

If force and displacement are in opposite direction, the work done is taken as:

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Positive work

Negative work

Zero work

Infinte work

When a wall is pushed by a person very strongly, he has done:

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Maximum work

Zero work

Positive work

Negative work

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

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