A cliff diver jumps horizontally off of a cliff and lands in the water 2.3 seconds later. They land 3.7 meters from the cliff. a) what was their initial velocity?
b) What is the height of the cliff?

Adding more pulleys to a system of pulleys needed to lift an object. a. increases the force b. decreases the force c. increases the amount of work d. decreases the amount of work

Ahot-air balloon is 11.0 m above the ground and rising at a speed of 7.00 m/s. a ball is thrown horizontally from the balloon basket at a speed of 9.00 m/s. ignore friction and air resistance and find the speed of the ball when it strikes the ground.

Why do atoms emit energy of only specific wavelengths