Answered: A CD with a diameter of 12.0 cm starts… | bartleby

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A CD with a diameter of 12.0 cm starts from rest and with a constant angular
acceleration of 1.0 rad/sec? acquires an angular velocity of 5.0 rad/sec. The CD
continues rotating at 5.0 rad/sec for 15.0 seconds and then slows to a stop in 12.0
seconds with a constant angular deceleration. What is the tangential velocity of a
point 4.0 cm from the center at the time 10.0 seconds from the start?

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Any item moving along a circular path has a linear component to its speed called tangential velocity. An object's velocity is always pointed tangentially when it travels in a circle at a distance r from the center. This is known as tangential velocity

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