Question # 1

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

In the force applied is parallel to the direction of motion, then work done is:

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Maximum

Minimum

Zero

None of these

Which one is conservative force

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Electric force

Frictional force

Normal force

Air resistance

Which of the following is not a unit of power:

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J-sec

Watt

N m/sec

Horsepower

The power of an electric generating station is expressed in:

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Kilo Jule

Kilowatt-hour

Kilo watt

Watt

Which force is not a conservative force?

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Frictional force

Gravitational force

Electric force

Elastic spring force

Area under the force displacement graph gives

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Power

Work

Heat

Energy

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

Which force is not a conservative force:

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Frictional force

Gravitational force

Electric force

Elastic spring force

The unit of work in CGS system is

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Joule

Erg

Dyne

Watt

The tidal energy is due to gravitational pull of :

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sun

moon

Mars

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

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

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

Work is a:

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Scalar quantity

Vector quantity

Base quantity

None of these

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

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