A person jumps off a diving board 4.6 m above the water's surface into a deep pool. The person's downward motion stops 1.6 m below the surface of the water. Estimate the average deceleration (magnitude) of the person while under the water.

4) During one of NASA's missions to the moon, an astronaut dropped a hammer from a height of 1.5 meters above the lunar surface. It took the hammer 1.369 seconds to land. Determine the acceleration due to gravity on the moon.

9) Generic Villain, in an airplane, is chasing Generic Hero who is driving a car. The speed of the airplane is 147 m/s and the speed of the car is 51.0 m/s. If the Villain, at an altitude of 1.00E2 m, wants to drop a bomb on the Hero (and assuming the airplane is in level flight) how far should they be away from the car when they do so? (If you care, the hero gets away with some generic special effects and, you know, turning...) (434 m)

A soccer player kicks a rock horizontally off a 46.0-m-high cliff into a pool of water. If the player hears the sound of the splash 3.25 s later, what was the initial speed given to the rock? Assume the speed of sound in air is 343 m/s. m/s