The figure represents a multiflash photograph of a ball being shot straight up b

Question

The figure represents a multiflash photograph of a ball being shot straight up by a spring. The spring, with the ball atop, was initially compressed to the point marked Y_bot and released. The point marked Y_0 is the point where the ball would remain at rest if it were placed gently on the spring, and the ball reaches its highest point at the point marked Y_top. For most situations, including this problem, the point Y_0 may be taken to be at the top of the spring, where the Indicate whether the following statements are true or false. Assume that air resistance is negligible. The speed of the ball was greatest at point Y_0 when it was still in contact with the spring. The speed of the ball was decreasing on its way from point Y_0 to point Y_top. The speed of the ball was zero at point Y_top. The speed of the ball was the same for all points in its motion between points Y_0 and Y_top. Consider the kinetic energy of the ball. At what point or points is the ball's kinetic energy greatest?

Explanation / Answer

Part A) t, t, t, f

Part B) Y0 only ( because the velocity is maximum here)

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