Question # 1

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

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Moon

Sun

Oceans

Water

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

A boy pulls a toy car through a distance of 5 m by applying a force of 0.5 N, Which makes an 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

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

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

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

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

Tick the conservative force

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Tension in a string

Air resistance

Elastic spring

Frictional force

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 done is lowering the bucket into the well is:

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Zero

Positive

Negative

None of these

Power is a :

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Vector quantity

Base quantity

Scalar quantity

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

Work done in lower and bucket into the well is:

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Zero

Positive

Negative

None of these

The tidal energy is due to gravitational pull of :

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sun

moon

Mars

None of these

Teh consumption of energy by a 1000 watt heater in half an hour is:

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5 Kwh

0.5 Kwh

2.5 Kwh

3.2 Kwh

Work done on a body by gravity in lifting it up to certain height is

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Maximum

Minimum

Zero

Negative

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