Which has greater kinetic energy a 2 kg mass moving at 3 m/s,or,a 1 kg mass moving at 6 m/s?

1 Answer
Jun 27, 2018

Kinetic energy is given by

#E_k=1/2mv^2# where #m# is mass object, and #v# velocity

In our case:

#E_(k1)=1/2·2·9=9#

#E_(k2)=1/2·1·36=18# and we see

#E_(k2)=2·E_(k1)# and therefore #E_(k2)>E_(k1)#