Question #87092

1 Answer
Victoria E. · Nam D.
Feb 1, 2018

I suspect you mean kinetic energy, not kinetic speed.
#KE = 1/2 mv^2#

Explanation:

The equation for kinetic energy is #KE = 1/2 mv^2#.

So, we can plug in the values given to find the #KE#.

#KE = 1/2(100 kg)(12.5m/s)^2#
#KE=1/2(100 kg)(156.25m^2/s^2)#
#KE = 7812.5 kgm^2/s^2#
#KE = 7812.5 J#

If significant figures are considered, record answer as #7810J# because the speed had only three significant figures

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