An overhead view of part of a pinball game is shown. If the plunger imparts an initial speed of 2.4 m/s to the ball at time t = 0, determine the acceleration a of the ball (a) at time t = 0.12 s and (b) at time t = 0.41 s. At point F, the speed of the pinball has decreased by 12% from the initial value, and this decrease may be assumed to occur uniformly over the total distance traveled by the pinball. Use the values r = 210 mm and θ = 69°.
Answers:
(a) t = 0.12 s, a =
(b) t = 0.41 s, a =