申論題

3. (25%) A homogeneous sphere of mass m and radius r falls without rotation upon a fixed and perfectly rough surface inclined at an angle o to the horizontal plane. The vertical velocity before impact is Vo, and the coefficient of restitution for the collision is e. Determine the angular velocity of the sphere, the velocity, and the direction of motion of the center of mass of the sphere after the impact. (The moment of inertia of the sphere is )