Match the following: Column A Column B a. A stone at a height i. power b. A Moving ball ii. joule c. Energy iii. work done in 1 s d. Power iv. potential energy e. Watt v. kinetic energy

a. A stone at a height - iv. potential energy The gravitational potential energy of a body in the raised position depends on the mass of the body, height of the body above the ground and acceleration due to gravity. b. A Moving ball - v. kinetic energy Kinetic energy of a body is the energy possessed by it due to its motion. c. Energy - ii. joule The S.I. unit of energy is joule (J). d. Power - iii. work done in 1 s Power is defined as the rate of doing work or the energy spent in one second. e. Watt - i. power The S.I. unit of power is joule per second or watt. column A Column B a. A stone at a height iv. potential energy b. A Moving ball v. kinetic energy c. Energy ii. joule d. Power iii. work done in 1 s e. Watt i. power

E M B I B E

Concise Physics Middle School for Class 8>Chapter 4 - Energy>TEST YOURSELF>Q A

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The S.I. unit of energy is .

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Important Questions on Energy

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Concise Physics Middle School for Class 8>Chapter 4 - Energy>TEST YOURSELF>Q A

Gravitational potential energy U = mass \times force of gravity on unit mass \times_____.

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Concise Physics Middle School for Class 8>Chapter 4 - Energy>TEST YOURSELF>Q A

Kinectic energy =

\frac{1}{2} \times mass \times {(_____)}^{2} .

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Concise Physics Middle School for Class 8>Chapter 4 - Energy>TEST YOURSELF>Q A

Power

P =_____/ time taken

(work done/ force)

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Concise Physics Middle School for Class 8>Chapter 4 - Energy>TEST YOURSELF>Q A

The S.I. unit of power is _____ (watt, newton).

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Concise Physics Middle School for Class 8>Chapter 4 - Energy>TEST YOURSELF>Q A

1

horse power

(H . P)

= _____ watt.

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8th ICSE

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Concise Physics Middle School for Class 8>Chapter 4 - Energy>TEST YOURSELF>Q A

Match the following:

Column A	Column B
a. A stone at a height	i. power
b. A Moving ball	ii. joule
c. Energy	iii. work done in $1 s$
d. Power	iv. potential energy
e. Watt	v. kinetic energy