# ass2 - Practice Problems 2 1 An athlete swims the length of...

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Practice Problems 2 1 . An athlete swims the length of a 47.1 m pool in 21.3 s and makes the return trip to the starting position in 23.3 s. Determine her average velocity in the first half of the swim. Answer: 2.21e+00 m/s 2 . Determine her average velocity in the second half of the swim. Answer: -2.02e+00 m/s 3 . Determine her average velocity in the round trip. Answer: 0.00e+00 m/s 4 . A tennis ball with a velocity of 10.4 m/s is thrown perpendicularly at a wall. After striking the wall, the ball rebounds in the opposite direction with a speed of 7.50 m/s. If the ball is in contact with the wall for 0.0117 s, what is the average acceleration of the ball while it is in contact with the wall? Answer: -1.53e+03 m/s^2 5. A ball is thrown upward from the ground with an initial speed of 25.1 m/s; at the same instant, a ball is dropped from a building 15.9 m high. After how long will the balls be at the same height?

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## This note was uploaded on 12/12/2011 for the course PHYSICS 1D03 taught by Professor N. mckay during the Spring '08 term at McMaster University.

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ass2 - Practice Problems 2 1 An athlete swims the length of...

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