Question # 1

Watt x second is unit of:

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Force

Work

Power

None of these

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 a

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Scalar quantity

Vector quantity

Base quantity

None of these

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

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Moon

Sun

Oceans

Water

If work is done at the rate of 2 k j per second, then total work done is half an hour will be:

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0.5 Kwn

2 Kwh

1 Kwh

None of these

Work is product of:

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Force and velocity

Heat and energy

Force and displacement

None of these

Energy stored in the spring of a watch is called

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Potential energy

Kinetic energy

Nuclear energy

Elastic potential

A laborer carrying a load on his head moves from the 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

In the force applied to parallel to the direction of motion, then the work done is:

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Positive

Negative

Zero

None of these

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

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Potential

Chemical

Mechanical

sound and heat

A boy pulls a toy car through a distance of 5 m by applying a force of 0.5 N, which makes and angle of 60° with the horizontal. The work done by the boy is:

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1.25 J

12.5 J

125 J

None of these

Area under the force displacement graph gives

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Power

Work

Heat

Energy

Which one is conservative force

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Electric force

Frictional force

Normal force

Air resistance

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

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

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

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

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