# Chapter 11-Work and Energy

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A spring has ________ when it is compressed or stretched.

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### 16 Terms

1

A spring has ________ when it is compressed or stretched.

potential energy

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2

If a ball is raised at a height h then its potential energy is mgh and when it falls on the ground the ________ will be 0.5mv^2

kinetic energy

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3

________ is capacity to do work.

Energy

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4

No work is done when body moves in _______

uniform velocity

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5

The ________ of an object at a point above the ground is defined as the work done in raising it from the ground to that point against gravity.

gravitational potential energy

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6

A ball has ________, when raised above the ground.

potential energy

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7

________ and energy are two sides of same coin.

work

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8

Work is said to be done when force is applied on object causing it to ____ in direction of applied force.

move

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9

1 Kilo Watt hour of energy is equal to ________ Joule

3.6X10^6

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10

The water released from the reservoir of the tank possesses_______ energy

kinetic

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11

Power is the rate of doing ______. And its unit is ___________

work,watt

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12
1. Work done by the force can be _____ , _____ and ______.

negative,zero and positive

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13

The work done by the earth on the satellite moving in circular path is _________

zero

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14

_________ is defined as the rate of transfer of energy

power

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15

sum of kinetic energy and potential energy is called________

mechanical energy

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16

work has no _____ and ________ so it is a scalar quantity

magnitude and direction

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