The conversation between human and AI assistant.
A ball is thrown vertically upward with an initial speed of 15 m/s from 80 m above the ground. Assume free fall conditions. (a) What is the max height? (b) Determine the magnitude of the velocity at 40 m above ground. (c) At what speed does the ball strike the ground?
Great. Now, for part (b), what is the magnitude of the velocity at 40m above ground?
Using the equations of motion and taking into account that the ball is moving upward at that point, we can calculate that the magnitude of velocity is 37.99 m/s.