Question #aec49

1 Answer
Daniel H.
Nov 30, 2017

#KE = 1/2mv^2#, so if the speed is halved, the KE will be reduced by a factor of 4.

Explanation:

Take an example of a mass of 5 and a velocity of 20.

#KE=1/2(5)20^2=1000J#

If the velocity is reduced to 10:

#KE=1/2(5)10^2=250J#

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