If an object with a mass of #15 kg # changes speed from #25m/s# to #14 m/s#, by how much does its kinetic energy change?

1 Answer
Feb 13, 2016

Answer:

#Delta E_k=-3217,5J#

Explanation:

#Delta E_k=1/2*m(v_f^2-v_i^2)#
#Delta E_k=1/2*15(14^2-25^2)#
#Delta E_k=1/2*15(196-625)#
#Delta E_k=-1/2*15*429#
#Delta E_k=-3217,5J#