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a. A horizontal platform in the shape of a circular disk ( I = 1/2 MR2)...

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Physics

a. A horizontal platform in the shape of a circular disk ( I =1/2 MR2) rotates in a horizontal plane about africtionless vertical axle. The platform has a mass M=200kg and aradius R=2.00 m. A student whose mass is m=60.0kg, walks slowlyfrom the rim of the platform toward the center. If the angularspeed of the system is 2.00 rad/s, when the student is at the rim,calculate the angular speed of the system when the student reachesthe center.

b. A particle of mass 0.50 kg is moving with a velocityv=(6i+8j) m/s.Find the angular momentum L relative to the originwhen the particle is atr=(2i+3k) m

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