Question 9 (1 point) A ball bounced on the ground as shown in the diagram. 300 30 The change in momentum of the ground is O A) Zero. ( B) Half the magnitude of the change in momentum of the ball. O ) The same magnitude as the change in momentum of the ball, but in the opposite direction. O D) The same magnitude as the change in momentum of the ball, and in the same direction.Question 10 (1 point) Three identical, stationary discs P, Q and R placed in a line on a horizontal, flat friction-less surface. Disc P projected head-on towards disc Q. R If the consequent collisions are perfectly elastic, what will be the final motion of the three discs? O A) P moving left, Q moving left, R moving right. O B) P moving left, Q stationary, R moving right. O C) P moving right, Q moving right, R moving right. O D) P stationary, Q stationary, R moving right.Question 11 (1 point) Four identical railway trucks, each of mass m, were coupled together and are at rest on a smooth horizontal track. A fifth truck of mass m and moving at 5.00 m/s collides and couples with the stationary trucks. What is the speed of the trucks after the impact? A) 0.67 m/s O B) 0.83 m/s O c) 1.00 m/s O D) 1.67 m/sQuestion 12 (1 point) Two metal spheres, suspended by vertical cords, initially touch each other. Sphere 1 with mass m1 = 30 g is pulled to the left to a height h1 = 8.0 cm and then released from rest. After swinging down, it undergoes an elastic collision with sphere 2 with mass m2 = 75 g which is at rest. What is the velocity of sphere 1 just after the collision? O A) -2.40 m/s O B) - 0.54 m/s O C) - 1.25 m/s O D) - 0.60 m/sQuestion 13 (1 point) Two metal spheres, suspended by vertical cords, initially touch each other. Sphere 1 with mass m1 = 30 g is pulled to the left to a height h1 = 8.0 cm and then released from rest. After swinging down, it undergoes an elastic collision with sphere 2 with mass m2 = 75 g which is at rest. What is the velocity of sphere 2 just after the collision? A) 0.72 m/s O B) 2.40 m/S O C) 1.25 m/s O D) 0.52 m/sQuestion 14 (1 point) Two metal spheres, suspended by vertical cords, initially touch each other. Sphere 1 with mass m1 = 30 g is pulled to the left to a height h1 = 8.0 cm and then released from rest. After swinging down, it undergoes an elastic collision with sphere 2 with mass m2 = 75 g which is at rest. To what height h2 does the sphere 2 swing to the right after the collision? O A) 0.5 cm O B) 1.0 cm O c) 2.6 cm O D) 3.2 cmQuestion 15 {1 point} Two metal spheres. suspended by vertical cords, initially.r touch each other. Sphere 1 with mass m1 = 30 g is pulled to the left to a height h1 = 8.0 cm and then released from rest. After swinging down, it undergoes an elastic collision with sphere 2 with mass m2 = 7'5 g which is at rest. To what height h1 does the sphere 1 swing to the left after the collision? /_-\\ 'x_/' A} 1.0 cm /_-\\ L} l3} 1.5 cm /_-\\ lam/I C} 2.0 cm /_"\\ "w'l D} 2.? cm