A 10 kg mass has a KE of 125 J, what is its velocity?

1 Answer
Richard G.
Dec 9, 2015

5 m/s

Explanation:

EK = 1/2 mv^2

Given: EK = 125J= 125 kgm^2/s^2, m = 10kg

So v^2 = (2EK)/m and v = sqrt ((2EK)/m)

v = sqrt((2*125(kgm^2)/s^2)/(10kg)) = sqrt(25m^2/s^2) = 5 m/s

Note: I solve the units first; it helps prevent mistakes.

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