Question # 1

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

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Zero J.

0.1 J

1 J

0.01 J

Work is a:

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Scalar quantity

Vector quantity

Base quantity

None of these

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-energy principle states that work done on the body by applied force is equal to change in:

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Potential energy

Kinetic nergy

Linear momentum

None of these

Work is a scalar product of

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Force, Velocity

Velocity, Displacement

Force, Displacement

Force, Momentum

Work done is independent of path followed in _______

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Gravitational field

Magnetic field

Electric field

All of these

Which of the following type of force can do no work on the particle on which it acts:

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Frictional force

Gravitational force

Electric force

Centripetal force

The dimensions of work

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[MLT^-1]

[MLT^-2]

[ML²T^-2]

[MLT]

The types of mechanical energy is/are:

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Kinetic energy

Potential energy

Both of these

None of these

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 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

Area under the force displacement graph gives

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Power

Work

Heat

Energy

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

Which of the following types of force can do no work on the particle on which it acts

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Frictional force

Gravitational force

Electric force

Centripetal force

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

Work done is maximum when angle between force and displacement is

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0°

90°

180°

None of these

When two protons are brought are brought closer potential energy of both of them:

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Increases

Decreases

Remains same

None of these

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°

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 a wall is pushed by a person very strongly, he has done:

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Maximum work

Zero work

Positive work

Negative work

Which force is not a conservative force?

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Frictional force

Gravitational force

Electric force

Elastic spring force

The ultimate source of money sources of energy is:

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Sun

Air

Water

Petroleum

The commercial unit of electrical energy is :

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K Watt

KWH

Horse power

Joule

If force and displacement are in opposite direction, the work done is taken as:

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Positive work

Negative work

Zero work

Infinite work

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

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

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0°

30°

60°

90°

Tick the conservative force

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Tension in a string

Air resistance

Elastic spring

Frictional force

1 J = ________?

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10⁷erges

10^-7erges

10⁵erges

10^-5erges

Escape velocity from surface of Moon as compared to that from Earth surface is:

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Greater

Smaller

Equal

None of thes

The power of an electric generating station is expressed in:

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Kilo Jule

Kilowatt-hour

Kilo watt

Watt

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