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Unformatted text preview: Problem Sheet - Collision 1. Suppose that two blocks move toward each other on a frictionless linear air track. After the collision, the two blocks stick together. The masses and initial velocities are m A = 0.50 kg, V A1 = 2.0 m⁄s, m B = 0.30 kg, V B1 = -2.0 m⁄s. (a) what is the total momentum of the two blocks before the collision? (b) What is the total momentum of the two blocks after the collision? (c) Calculate the final velocity of the blocks. (d) What is the total kinetic energy of the two blocks before the collision? (e) What is the total kinetic energy of the two blocks after the collision? (f) Is this collision elastic or inelastic? Justify your answer. (g) How much kinetic energy is lost during this collision? (h) Explain what has happened to this lost energy. 2. A car of mass 1000 kg traveling west at 20 m/s crashes into the rear of a stationary bus of mass 5000 kg. The vehicles lock together on impact. Assume that road friction is negligible. (a) What is their joint velocity immediately after the collision? (b) What is the total kinetic energy of the system before the collision? (c) What immediately after the collision?...
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This note was uploaded on 04/16/2011 for the course EEE 30 taught by Professor Dr.sohrabuddin during the Spring '11 term at American Intl. University.
- Spring '11