p140w07_ct_9 - Racquetball Striking a Wall Copyright: Loren...

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Physics 140: Winter 2007 Lecture #9 Feb 1, 2007 Dave Winn Racquetball Striking a Wall Copyright: Loren M. Winters Mt. Etna Andrew Davidhazy
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Exam information • First exam: Tonight Thursday Feb 1 from 6:00-7:30 PM • We will start promptly • Bring a calculator • Bring a 3”x5” card with whatever you want to remember (both sides OK)
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Exam Review • Kinematics: position, velocity, acceleration •1 st Law: what is change? •2 nd Law: Relating force to change •3 rd Law: All forces are interactions • Free body diagrams • Forces: normal, friction, tension, gravity • Particular 2D motions: projectiles, circular motion • General 2D motion
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A 1 kg object is thrown vertically upward with an initial velocity of 100 m/s, and a 10 kg objects is thrown upwards with an initial velocity of 10 m/s. The maximum height of the first object will be ???? times that of the other. 1.1 times 2.10 times 3.100 times 4.1000 times 5.10,000 times g v y gy v v i i f 2 2 2 2 2 = =
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p140w07_ct_9 - Racquetball Striking a Wall Copyright: Loren...

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