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(20 points) Dynamics of linear and rotational motions The cord in the gure pulls the block with mass m=4 kg along inclined plane (6 =30")....

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Screen Shot 2018-05-15 at 2.13.28 PM.png

Screen Shot 2018-05-15 at 2.13.28 PM.png

3. (20 points) Dynamics of linear and rotational motions The cord in the figure pulls the block with mass m=4 kg along inclined plane (6 =30”). Friction coefllcient between
the plane and the block is “=03. The block moves up with constant acceleration (i=4 m/sz. In the setup the cord
passes over the pulley without slip. Moment of inertia of the pulley is 1:3 kg"‘m2 and the radius R=0.3 In. There is
also friction between the pulley’s body and the pulley’s axle. The friction creates an additional, constant torque
Tf=7 N*m applied to the pulley and directed opposite to the direction of the pulley rotation. What is the magnitude of the force F applied to the other end of the cord? '17
r

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