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A solid disk is rotating about a frictionless axle with an initial angular velocity of 15...

A solid disk is rotating about a frictionless axle with an initial angular velocity of 15 rad/s in a clockwise direction. The disk has a mass of 5.0 kg and a radius of 15 cm. A force of 20 N is applied to the disk for 0.5 s. This force is applied in a direction tangent to the edge of the disk that causes the disk to increase speed in the clockwise direction. I (disk) = ½ MR^2

a. What are the initial magnitude and direction of the angular momentum about the center of the disk? (Assume the disk is rotating in the plane of the paper.) ANSWER: -0.84 KG M^2/S

b. What are the final magnitude and direction of the angular momentum about the center of the disk? ANSWER: -2.34 KG M^2/S

c. What are the final magnitude and direction of the angular velocity of the disk? ANSWER: -41.8 RAD/S

kindly let me know how to get the above answers

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