Answer:
it's 149916
Step-by-step explanation:
Formula = 1/2 x m x v^2
so if you put into your calculator 1/2 x 78 x 62^2
you get 149916
149,916J
Pneumonic device: Kevin is half-mad and very square
this translates to: KE=(1/2)mv^2 !!
KE=(1/2)(78)(62^2)
KE=(39)(3844)
KE=149,916 Joules
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