Question

Two masses M1=2kg and M2 are attached by a massless cord over a solid pulley wheel of mass M=4kg, and radius R=5cm. Static Friction between the cord and the pulley makes the pulley rotate counter-clockwise when the system is released from rest, M1 accelerates with a magnitude of 3.92 m/s2 .

a) Draw and label the forces acting on the two blocks, and the pulley. (6 points)

b) Find the tension in the cord between the pulley and M1 (6 points)

c) Find the tension between the pulley and M2 (6 points)

d) Find M2 (6 points)

e) if someone uses their finger to impose a frictional torque which reduces the acceleration to 0 m/s2 , rewrite the torque equation, and use it to evaluate the coefficient of kinetic friction, between the finger and the wheel, if the radial force exerted by the finger is 56N (6 points)

Answer #1

As per guidelines, only first four sub parts are to be answered

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attached by a cord running over a pulley as in the figure below.
The pulley is a solid cylinder with mass
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r = 0.200 m.
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angle θ = 310 with the
horizontal and the kinetic friction coefficient between the
inclined plane and m1 is
=0.35. Take g=10m/s2 Find
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Two masses
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