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Unformatted text preview: numbers. It is your responsibility to convince the grader that you know what you are doing. Multiple Choice Answers: 1) C 2) D 3) B 4) B 5) B 6) C 7) C 8) A 9) D 10) B Problem 1: For the given reference frame: a) 2.0 m/s b) At snow level, Ball A is moving at 14.7 m/s and Ball B is moving at 16.7 m/s Ball A will undergo a displacement of 0.65 m, while ball B will undergo a displacement of 0.84 m. c) See a TA for graph. BONUS: 8.0 m/s Problem 2: For the given reference frame: a) The position of the snowball at apex (t = 1.51 s) is m j i r ) ˆ 31 ˆ 27 ( + = v . The velocity at is s m i v ) ˆ 18 ( = v . The acceleration is 2 ) ˆ 8 . 9 ( s m j a-= v . b) When y=0, x sled = x ball = 70.9 m. Acceleration of sled: a = -4.9 m/s 2 . So, he should slow down. c) ( 29 s m j i v BALL ˆ . 5 ˆ 18-= v BONUS: The speed of the ball is 30 m/s at an angle of o 54 below the horizontal....
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