A. conserve momentum. If Jay's mass is m, then
5.8(m+2) = 13*2 +5.4m
m = 36 kg
B. Now just figure the KE for Jay and the board: KE = 1/2 mv^2
Initially, KE = 1/2 * (36+2) * 5.8 = 110.2J
Now find the final KE and compare
Jay rides his 2.0-kg skateboard. He is moving at speed 5.8 m/s when he pushes off the board and continues to move forward in the air at 5.4 m/s. The board now goes forward at 13 m/s.
A. Determine Jay’s mass.
B. Determine the change in the internal energy of the system during this process.
(Express your answer to two significant figures and include the appropriate units.)
1 answer
1 answer