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Unformatted text preview: Name
ID# Physics 201
Exam 2
11 March 2008 SCI AB
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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? %
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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?
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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.
 Fall '08
 Walker
 Physics

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