15. A baseball with a mass of 0.25 kg is thrown by a pitcher and is traveling at 60 m/s when it is hit by a bat with a mass of 1.0 kg. The ball travels directly back to the pitcher at a speed of 80 m/s. What is the magnitude of the impulse given to the ball by the bat? A) 0kg-m/s B) 5kg-m/s C) 20 kg-m/s D) 35 kg-m/s E) l75kg-n1/s 16. The same torque is applied to two different objects. about their axes of rotation. I Object A: A disk of mass M and radius R. with its axis of rotation through the center. perpendicular to the plane of the disk I Object B: A disk of mass M and radius R, with a point mass of mass EM, attached to the outer rim. The axis of rotation is also Ihrough the center of the disk. perpendicular to the plane of the disk. Object A Object 8 Point mass ( attached to rlm How does the magnitude of the angular acceleration ofthe 2 objects compare? A) A >a3 B) a. >a, C) A :01; 1?. Object A is traveling East at 4.0 mls when it collides with a stationary object B with the same mass. Aer the collision, object A is moving North with a speed of 3.0 mls. What is the nal speed of object B? A) 1.0 min.- B) 3.0 m/s C) 4.0 m/s D) 5.0 mis E} 7.0 m/s