Physics. Energy WCLN.ca b. Examine the kinetic energy curve on the graph above. Given that his mass was 75kg calculate his speed, v, at the times below using KE = 1/2mv Speed at zero seconds: show any work below: Estimate for the kinetic energy, KE, at this time =_ Boo s 2 V =_ m/s Speed at 6.8 seconds: show any work below Estimate for the kinetic energy, KE, at this time = KE muz ( 751 - ) ( 10 . 8 /1 ) - v = 20.0 m/s Speed at 8.1 seconds: show any work below Estimate for the kinetic energy, KE, at this time = /8 9 J KE= 2 mv - 3 ( 75 kg ) ( 12 . 1 my ) ? v = 12 .1 1 815 m/s Speed at 5.3 seconds: show any work below Estimate for the kinetic energy, KE, at this time = ( 75 ks ) ( 51 Says ) 2 v = m/s KE = 1mv 2 m=mass of object (kg ) V= velocity of object (m/s ) EK = Kinetic energy Joules) 2021-07-12 Page 7 of 11