If an object with a mass of 3kg 3kg changes speed from 5m/s5ms to 3m/s3ms, by how much does its kinetic energy change?

1 Answer
Feb 9, 2016

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