# 2 - derive an expression for the speed V with which the...

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Department of Physics and Astronomy University of Canterbury PHYS113-08S2 Homework #2, 2008 Due 1 st August Attempt all questions in writing before you come to the tutorial. All problems will be discussed with your tutor in group sessions in the tutorials. Hand in your written work to receive credit for the homework. 1. The fast French train known as the TGV (Train à Grande Vitesse) has a scheduled average speed of 216 km/h. (a) If the train goes around a curve at that speed and the magnitude of the centripetal acceleration experienced by the passengers is to be limited to 0.050 g , what is the smallest radius of curvature for the track that can be tolerated? (b) At what speed must the train go around a curve with a 1.00 km radius to be at the acceleration limit? (Use g = 9.8 ms -2 .) 2. 2006 113-S2 Term Test Question 1. A marble is released from a height h above the ground. By considering energy
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Unformatted text preview: derive an expression for the speed V with which the marble hits the ground. (Assume acceleration due to gravity is g ) 3. 2006 113-S2 Term Test Question 5 A rubber squash ball rebounds off a wall. At some instant the ball is motionless. Explain what has happened to the ball's kinetic energy. 4. A dog who jumps into the interior of a stationary ice boat is moving at v 1 = 32 km/h when he enters the boat, and his landing onto the boat can be regarded as a collision. The dog’s mass is 14 kg and that of the boat plus boater is 160 kg. You can assume all of the motion is horizontal. a. Assuming that the ice surface is frictionless, what is the velocity of the boat after the collision? b. What is the ratio of the kinetic energy loss to the initial kinetic energy? c. Kinetic energy is lost. Where did it go?...
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## This note was uploaded on 10/02/2008 for the course PHYS 113 taught by Professor Hearnshaw during the Spring '08 term at Canterbury.

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