Question # 1

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

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

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

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

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Moon

Sun

Oceans

Water

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

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

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

Tick the conservation force:

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Tension in a string

Air resistance force

Elastic spring

Frictional force

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

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0°

90°

180°

None of these

Work is product of:

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Force and velocity

Heat and energy

Force and displacement

None of these

SI Unit of work is

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Nm^-1

Joule

Nms

Both a and b

When a falling body hits ground, its KE changes to _____ energy.

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Potential

Chemical

Mechanical

sound and heat

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

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Nuclear filed

Conservative field

Gravitational field

Non-conservative field

The commercial unit of electrical energy is :

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K Watt

KWH

Horse power

Joule

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

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

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Physics ECAT Pre Engineering Chapter 4 Work and Energy Online Test MCQs With Answers

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