Question # 1

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

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

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Scalar quantity

Vector quantity

Base quantity

None of these

Watt x second is unit of:

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Force

Work

Power

None of these

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

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Unity

Infinity

Zero

-Fd

Tick the conservation force:

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Tension in a string

Air resistance force

Elastic spring

Frictional force

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

Energy stored in the spring of a watch is called

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Potential energy

Kinetic energy

Nuclear energy

Elastic potential

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

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60°

90°

30°

0°

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

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

If one newton force acts on a body and displaces the body through 1m work done on body is

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1 dyne

1 joule

1KJ

1 Watt

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

The power of an electric generating station is expressed in:

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Kilo Jule

Kilowatt-hour

Kilo watt

Watt

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

Power is a :

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Vector quantity

Base quantity

Scalar quantity

None of these

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