1 2 10.0 m/s 20.0 m/s 20.0 kg 20.0 kg KE = } mv2 KE = } mv2 KE = }(20.0 kg)(10.0 m/s)2 = 1.00X 103 J |KE = ;(20.0 kg)(20.0 m/s)2 = 4.00X 103 ] When velocity doubles then KE KINETIC ENERGY increases by a factor of 4. (Compare to 1) 3 4 10.0 m/s 20.0 m/s 40.0 kg 40.0 kg KE = } mv2 KE = } mv2 KE = }(40.0 kg)(10.0 m/s)2 = 2.00X103 J KE = }(40.0 kg)(20.0 m/s)2 = 8.00x103 J When mass doubles then KE When mass and velocity both doubles. (Compare to 1) double the KE increases by a factor of 8. (Compare to 1)