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(Solution) - The reel shown in Figure P10 70 has radius R

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The reel shown in Figure P10.70 has radius R and moment of inertia I. One end of the block of mass m is connected to a spring of force constant k, and the other end is fastened to a cord wrapped around the reel. The reel axle and the incline are frictionless. The reel is wound counterclockwise so that the spring stretches a distance d from its unstretched position and is then released from rest.

 

(a) Find the angular speed of the reel when the spring is again unstretched.

 

(b) Evaluate the angular speed numerically at this point if I = 1.00 kg ?m2, R = 0.300 m, k = 50.0 N/m, m = 0.500 kg, d = 0.200 m, and ? = 37.0°

 



 







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