Question

Detemine the kinetic energy of the system before the collision. Express your answer with the appropriate units. K Value Units Submit Request Answer ▼PartC Determine the kinetic energy of the system after the collision. Express your answer with the appropriate units. I Value Units Submit Request Answer Part D Is the collision elastic, inelastic, or totally inelastic? elastic nelastic totally inelastic

Answer 1

Part B From the graph, the velocity of the mass of cart A before collision is zero. Similarly, the velocity of the mass of the cart B is the slope of the graph B. 1 m vg = =0.5 m/s The kinetic energy of the system before collision is, KE = 5 m.vi+ mově = }(1.0 kg)(0.5 m/s)* = 0.125 J Part C From the graph, the velocity of the mass of cart A after collision is the slope of the graph A. (1.6-1) m -=0.3 m/s (4-2)s Similarly, the velocity of the mass of cart B after collision is the slope of the graph B. Var (0.8-1) m -= -0.1 m/s - (4-2)s The kinetic energy of the system after collision is, KE, - zmnis +movie = {(2.0kg)(0.3 m/s)*+2 (1.0 kg)(-0.1 m/s)* = 0.095 J Part D From the above two case, the initial kinetic energy of the system is not equal to the final kinetic energy of the system. Hence, kinetic energy of the system is not conserved. Hence, the collision is inelastic.