Asked by Charlotte

john is walking at such speed so that his kinetic energy is 20 J, what is his speed? It started to rain John runs at a rate of 4.2 m/s find the change in KE.
Answered by bobpursley
KE=1/2 m v^2 what is mass?
Answered by Anonymous
sorry i forgot.john is walking at such speed so that his kinetic energy is 20 J, what is his speed? It started to rain John runs at a rate of 4.2 m/s find the change in KE if his mass is 50 kg.
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