Question # 1

Watt x second is unit of:

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Force

Work

Power

None of these

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

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Maximum

Minimum

Zero

Unity

When a body 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

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.

The work done moving a body between two points in a conservation field is independent of the:

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Direction

Force applied

Path followed by the body `

Power

Work done in lower and bucket into the well is:

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Zero

Positive

Negative

None of these

If we draw a graph between d(along x-axis) and F (along y-axis) and get a straight line horizontal to x-axis then area under this straight line represents:

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Power

Work

Pressure

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

Work is a Quantity

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Vector

Scalar

Non-physical

None of these

The angle between centripetal force and displacement of the body moving in a circle is:

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0°

90°

180°

None of these

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

The work done in moving a body between two points in a conservation field is independent of the:

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Direction

Force applied

Path followed by the body

Power

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

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0°

90°

180°

None of these

Which one is conservative force

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Electric force

Frictional force

Normal force

Air resistance

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

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