Q15. In the image below, disk A and disk B are approaching each other, and they have a mass of ma = 0.7 kg and mg = 1.0 kg, respectively. The directions of their initial velocities, as well as the plane of contact, are shown in the image, and the speeds are vA1 = 4.7 m/s and vp1 = 2.7 m/s. If the coefficient of restitution between the balls is e = 0.2, determine the speed of disk Bafter collision. Please pay attention: the numbers may change since they are randomized. Your answer must include 3 places after the decimal point, and proper Sl unit. y VA,1 X- VB,1 В 3 4

Determine the velocity of the disk A just after collision. Express your answer to three significant figures and include the appropriate units.

Q11. As shown in the image below, the freight cars A and Bare approaching each other, and they have a mass of mA = 19 Mg and mB = 14 Mg, respectively. The directions of their initial velocities are shown in the image, and the speeds are vA,1 = 9.2 m/s and vB.1 = 6.8 m/s. If the coefficient of restitution between the bumpers is e = 0.4, determine the velocity of A after collision. Right is considered the positive direction and negative sign must be included if A moves to the left after the collision. Please pay attention: the numbers may change since they are randomized. Your answer must include 3 places after the decimal point, and proper SI unit. %3D V4,1 A VB,1 В Your Answer: Answer units

Problem 96. A child throws a ball from point A with a speed of 50 ft/sec. It strikes the wall at point B and then returns exactly to point A. Determine the necessary angle a if the coefficient of restitution in the wall impact is e = 0.5. -10-

Hi, I have an engineering dynamics question.

Q10. In the image below, the directions of the velocities of ball A and ball B before and after their collision are given. If the speeds are vA.1 = 10.1 m/s, vB.1 = 2.3 m/s, VA,2 = 2.4 m/s, and vB,2 = 6.9 m/s. Determine the coefficient of restitution e between ball A and ball B. Please pay attention: the numbers may change since they are randomized. Your answer must include 3 places after the decimal point. VA,1 VB,1 A В Before collision V4,2 VB,2 A В After collision Your Answer: Answer

Two spheres of different masses and initial velocities collide with each other on frictionless surface, as shown in Figure 5. Assume the collision is direct central and the coefficient of restitution e = 0.8, determine their velocities after the collision.