The kinetic energy K (in joules) of a falling apple is represented by K=v squared divided by 2 where v is the speed of the apple (in meters per second). How fast is the apple traveling when the kinetic energy is 32 joules?

Question

Shirley

Mathematics

4 May, 21:45

The kinetic energy K (in joules) of a falling apple is represented by K=v squared divided by 2 where v is the speed of the apple (in meters per second). How fast is the apple traveling when the kinetic energy is 32 joules?

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Answers (1)

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Bowers · Answer 1

Do subsitution

energy (k) = 32

so

32 = (1/2) v^2

(I'm pretty sure it is K = (1/2) mv^2, but ok)

times 2 both sides

64=v^2

sqrt both sides

8=v

8m/s is velocity