Question # 1

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 work done on the body will be zero if:

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No force is applied on the body

Force is applied but no displacement

Angle between F(force) and d(displacement) is 90°

All of these are correct

When force and displacement are perpendicular to each other than work is equal to

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Unity

Infinity

Zero

-Fd

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

Work is a:

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Scalar quantity

Vector quantity

Base quantity

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

Which force is not a conservative force?

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Frictional force

Gravitational force

Electric force

Elastic spring force

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°

Maximum work is done when force and displacement are

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Parallel

Antiparallel

Perpendicular

Both a and b

Which one is conservative force

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Electric force

Frictional force

Normal force

Air resistance

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

Watt x second is unit of:

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Force

Work

Power

None of these

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 dimensions of work

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[MLT^-1]

[MLT^-2]

[ML²T^-2]

[MLT]

A solar cell is made from:

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Iron

Silicon

Germanium

Copper

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