ECAT Pre General Science Physics Chapter 4 Work and Energy

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  • Chapter NameCh 4 - Work and Energy

ECAT Pre General Science Physics Chapter 4 Work and Energy

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ECAT Pre General Science Physics Chapter 4 Work and Energy

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Question # 1

The value of escape velocity of Earth planet comes out to be:

Question # 2

The dimensions of work

Question # 3

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

Question # 4

The field in which work done is moving body between two points depends upon the path followed is called:

Question # 5

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

Question # 6

Which force is not a conservative force:

Question # 7

The total work done in moving the body up and then down through the same height in a gravitational field is equal to:

Question # 8

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

Question # 9

A laborer carrying a load on his head moves from the rest on a horizontal road to another point where he comes to rest. He has done:

Question # 10

The work performed on an object does not depend on

Question # 11

Work is a scalar product of

Question # 12

The commercial unit of electrical energy is :

Question # 13

Tick the conservative force

Question # 14

Tick the conservation force:

Question # 15

The amount of coal used since 1945 up till now as compared to that used in the whole of history before that is

Question # 16

Work done by the force of friction is always

Question # 17

Which of the following is not a unit of power:

Question # 18

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

Question # 19

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

Question # 20

Work is product of:

Question # 21

Work is always done on a body when:

Question # 22

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:

Question # 23

The power of an electric generating station is expressed in:

Question # 24

Most of the geysers occur in:

Question # 25

Which one is conservative force

Question # 26

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

Question # 27

The tidal energy is due to gravitational pull of :

Question # 28

When force and displacement are perpendicular to each other than work is equal to

Question # 29

The work done in moving a body between two points in a conservative field is independent of the

Question # 30

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

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