B. A swimmer uses a water slide to enter the main pool. The swimmer starts with a
velocity of 1.25 m/s, and slides without friction through vertical height of 5.30 m.
[6]
i. Draw a diagram to explain the energy transformations.
ii. Calculate her speed just before entering the water at the bottom of the slide.

What is the force that opposes motion and works against the downward pull? a) friction b) gravity c) weight d) acceleration

An object resting on a table weighs 100 n. with what force is the object pushing on the table? with what force is the table pushing on the object? explain how you got your answer.

Aball is thrown from the top of a building with an initial velocity of 21.9 m/s straight upward, at an initial height of 51.6 m above the ground. the ball just misses the edge of the roof on its way down, as shown in the figure. (a) determine the time needed for the ball to reach its maximum height. (b) determine the maximum height. (c) determine the time needed for the ball to return to the height from which it was thrown, and the velocity of the ball at that instant. (d) determine the time needed for the ball to reach the ground. (e) determine the velocity and position of the ball at t = 5.35 s.