If an object with a mass of # 3kg # changes speed from #5m/s# to # 3m/s#, by how much does its kinetic energy change?

1 Answer
Feb 9, 2016

Answer:

#Delta E_k=-24 J#

Explanation:

#Delta E_k=1/2*m(v_l^2-v_i^2)#
#Delta E_k=1/2*3(3^2-5^2)#
#Delta E_k=1/2 *3(9-25)#
#Delta E_k=1/2*3(-16)#
#Delta E_k=-24 J#