EX2solutions2

EX2solutions2 - Name ID# Physics 201 Exam 2 11 March 2008...

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Unformatted text preview: Name ID# Physics 201 Exam 2 11 March 2008 SCI AB 204Student3 average 80.2 4'3 Median :32 For eacm . E 3'3 BC 3 prOVIdEg A t _ :l wrll be a A diagrar“ ED D Fes' C D 1:: F F F D—I—I—I—I—I—I 50 an m an 9|: 1:“: I: LI wed Sm re 1) A bucket of water of mass m is being swung around vertically by a rope of length R. At the bottom of the circle, the speed of the bucket is v0 and is sufficient to keep the rope taut all around the circle. a. Find the speed at the top of the circle. ELMU‘D‘: éMU—zfiL 2mg R ,0}: “03'1— 4%; K b. Find the tension in the rope at the top. .— Vg‘zfl m(?f+T 2) Two masses m1=2 kg and m2 are connected by a rope and pulley, as shown. The coefficients of friction between m2 and the -, table are p5=O.5 and pk=0.2. a. What is the maximum value of mg allowed for the system to start moving? mi (3 > M5 m?- % Wi>flsmz M 4%) ': 7' Jam ()6 m2< L/ 153 b. Suppose m2=‘t kg. Find the acceleration of the system. 60,4414}, Q 2: VV‘, ?, "/43 M29 a 7, aggltqrw/J‘) «— 01(4492/9W’7J‘) _______/___________/ (o 9% MW a: fiWM/gz c. The rope breaks when the blocks are moving at 0.5 m/s. How far will m2 slide before coming to rest? iwug first/Mg"?! l 01: E: @5M/s) ml mama 3) A block of mass m1=4 kg is attached to a cord of length I1=O.1 m that is fixed at one end. The block moves in a horizontal circle on a frictionless table. A second block of mass m2=2 kg is attached to the first by a cord of length |2=0.1 m, and thus moves in a circle of radius I1+l2. If the period of the motion is T=5 sec, find the tensions t1 and t2 in each cord. ll 2(0N 0.43M 4) A rocket is to be fired from one planet directly to its neighbor. The planets are identical spheres of radius R and mass M and they are a distance 5R apart. What minimum velocity must be given a rocket on the surface of one of the planets in order that it be able to reach the other? l 9 cm Suntart’ m/ij i x éMw_é:"lW : —6Wlm)xz EZZWUH T 'Q 95(153 MW 4 fl. Wm :14— éz-wl-aé’fitmq'é’r‘t 3° “1 L we 71" lo (L igm ...
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This homework help was uploaded on 03/27/2008 for the course PHYS 201 taught by Professor Walker during the Fall '08 term at Wisconsin.

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EX2solutions2 - Name ID# Physics 201 Exam 2 11 March 2008...

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