Question

A boy reaches out of a window and tosses a ball straight up withaspeed of 10 m/s. The ball is 20 m above the ground as hereleasesit. Use energy to find

Part 1
The ball's maximum height above the ground. (2 sig figs in m)

Part 2
The ball's speed as it passes the window on its way down. (2sigfigs in m/s)

Part 3
The speed of impact on the ground. (2 sig figs in m/s)