EXAM_2_&ndash;_Fall2011_Practice[1]

# 50 m our unit vectors are defined such that the

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Unformatted text preview: aration between the two bodies is r1, the kinetic energy of the system is B ­C. A) 2, 3, 4 B) 1, 3, 4 C) 2, 4, 5 D) 1, 4, 5 E) 2, 4, 6 PHYS 172 – Hand ­written Portion (30 points total) Name (Print): _______________________________________________________ Signature: __________________________________________________________ PUID: _____________________________________________________________ You will lose points if your explanations are incomplete, if we can’t read your handwriting, or if your work is sloppy. Hand ­Written Problem: Tossing a Ball You toss a ball (mass = 140 g) straight up into the air. The ball leaves your hand with a speed of 10 m/s, at a height of 1.5 meters above the ground, such that the initial position vector is <0,1.5,0> m. Our unit vectors are defined such that the y ­direction points straight up into the air. In this problem you’ll use the energy principle to predict the speed...
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## This document was uploaded on 03/25/2014 for the course PHYS 172 at Purdue.

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