# Physics - Kinetic energy

What is kinetic energy?
Energy stored in moving object
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How do you calculate it?
0.5 x mass x velocity(squared)
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What are the units for Kinetic energy?
Joules (J)
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What is mass measured in?
Kg
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What is velocity measured in?
m/s
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A car runs on petrel, which is a store of ___ energy
Chemical
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Where does the chemical reaction take place?
Engine
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Chemical energy is converted to __ energy store as car moves
Kinetic
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The car has a mass of 700kg and speed of 20m/s. Calculate kinetic energy
0.5 x 700 x 20(squared) = 140,000J
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We can convert answer to KJ (kilojoules). 1 KJ = 1000 J. Convert the answer.
140KJ
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A ball is travelling 50m/s and has kinetic energy of 75J. Calculate mass of ball.
75/0.5 x 50(squared) = 0.06kg
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## Other cards in this set

### Card 2

#### Front

How do you calculate it?

#### Back

0.5 x mass x velocity(squared)

### Card 3

#### Front

What are the units for Kinetic energy?

#### Back ### Card 4

#### Front

What is mass measured in?

#### Back ### Card 5

#### Front

What is velocity measured in?

#### Back 