Lesson 2: Kinetic & Potential Energy

A car racing around a track has ___________________________ energy.

• potential

• kinetic

• positional

• crazy fast

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kinetic energy is demonstrated by...

• a small rock on the ground

• a branch on a tree

• a rock rolling down a hill

• a book sitting on a table

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The two factors of kinetic energy

• power & force

• mass & speed

• position & shape

• work & energy

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as mass increases

• kinetic energy decreases

• kinetic energy increases

• speed decreases

• speed increases

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as speed increases

• kinetic energy increases

• kinetic energy decreases

• potential energy increases

• potential energy decreases

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equation for calculating kinetic energy

• w=fxd

• p=w/t

• 1/2 x mass x (speed)2

• weight x height above the ground

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Kinetic Energy Unit of measure

• Newtons

• Joules

• Watts

• Kg

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A dog with a mass of 20 kg and running at a speed of 3 m/s has _________________ Joules of kinetic energy

• 70 J

• 80J

• 90J

• 180 J

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If the mass of an object doubles, the kinetic energy of the object increases

• 20 J

• 40 J

• four-fold (x4)

• two-fold (x2)

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If the speed of an object doubles, the kinetic energy of the object increases by

• 20 J

• 40 J

• four-fold (x4)

• two-fold (x2)

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