PHYSICS F/SCI.+ENGR.,CHAPTERS 1-37
5th Edition
ISBN: 9780134378060
Author: GIANCOLI
Publisher: RENT PEARS
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Textbook Question
Chapter 10, Problem 50P
(II) Two blocks are connected by a light string passing over a pulley of radius 0.15 m and moment of inertia I. The blocks move (towards the right) with an acceleration of 1.00 m/s2 along their frictionless inclines (see Fig. 10–54). (a) Draw free-body diagrams for each of the two blocks and the pulley. (b) Determine FTA and FTB, the tensions in the two parts of the string. (c) Find the net torque acting on the pulley, and determine its moment of inertia, I.
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(II) Two blocks are connected by a light string passing over
a pulley of radius 0.15 m and moment of inertia The
blocks move (towards the right) with an acceleration of
1.00 m/s² along their frictionless inclines (see Fig. 10-54).
(a) Draw free-body diagrams for each of the two blocks and
the pulley. (b) Determine FTA and FTB, the tensions in the
two parts of the string. (c) Find the net torque acting on the
pulley, and determine its moment of inertia, I.
a = 1.00 m/s2
FTA
ТА
FTB
Letn
MĄ = 8.0 kg
%3D
mB = 10.0 kg
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61%
32°
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FIGURE 10
(i) Draw an extended free body diagram of a unicycle being pedaled on a gravel path (I have
included a starting point for what the unicycle looks like). Assume there is friction from the
gravel on the tire and the pedal is fixed at 90 degrees with respect to the lever arm. Also
assume as you pedal, the pedal will not hit the ground (Rpedal < Rire, the diagram is not
drawn to scale).
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(ii) Write down Newton's second law for this situation. Label and define any radii, forces,
moment of inertia, masses etc so I know what each variable means. Please break each variable
down to base components/definitions (i.e. FG = mg).
(iii) If we are "spinning out" aka the tire spins and the unicycle does not move forward, does
your extended free body diagram change? If so, how? What condition can we no longer use?
(II) A softball player swings a bat, accelerating it from restto 2.6 rev/s in a time of 0.20 s. Approximate the bat asa 0.90-kg uniform rod of length 0.95 m, and compute thetorque the player applies to one end of it
Chapter 10 Solutions
PHYSICS F/SCI.+ENGR.,CHAPTERS 1-37
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