Question # 1

The space around the earth within it exerts a force of attraction on other bodies of known as:

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Nuclear field

Conservative field

Electric field

Gravitational field

A body moves a distance of 10 m among a straight line under the action of a force of 5 N. If the work done is 25 J, the angle which the force makes with the direction of motion of a body is:

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0°

30°

60°

90°

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

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0°

90°

180°

None of these

Which force is not a conservative force?

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Frictional force

Gravitational force

Electric force

Elastic spring force

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

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

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

Work has the dimension as that of:

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Torque

Angular momentum

Linear momentum

Power

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

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

Tick the conservation force:

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Tension in a string

Air resistance force

Elastic spring

Frictional force

Work is a

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Scalar quantity

Vector quantity

Base quantity

None of these

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

Work is a scalar product of

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Force, Velocity

Velocity, Displacement

Force, Displacement

Force, Momentum

Work is product of:

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Force and velocity

Heat and energy

Force and displacement

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

The commercial unit of electrical energy is :

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K Watt

KWH

Horse power

Joule

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 done is maximum when angle between force and displacement is:

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0°

90°

180°

None of these

Work done by the force of friction is always

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Positive

Zero

Negative

Maximum

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

A field in which the work done in moving a body along closed path is zero is called

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Nuclear Field

Conservative field

Gravitational field

Non-conservative field

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

The work done by a force, keeping an object in circular motion with constant speed is:

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Zero J

1 J

0.1 J

0.01 J

A two Kg block is held 1 m above the floor for 50 seconds, the work done is:

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Zero

10.2 J

100 J

980 J

Work is always done on a body when:

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A force acts on it

It moves through certain distance

None of A and B is correct

Both A and B is correct

Which force is not a conservative force:

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Frictional force

Gravitational force

Electric force

Elastic spring force

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

The Space around the Earth within which it exerts a force of attraction on other bodies is known as

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Nuclear field

Conservative field

Electric field

Gravitational field

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

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

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