Include all steps and units! 1. Which of the following frictionless ramps (A, B, or C) will give the ball the greatest speed at the bottom of the ramp? Explain. C B A 2. A 57.0 kg diver dives from a height of 15.0 m. She reaches a speed of 14.0 m/s just before entering the water. What was the average force of air resistance (i.e., friction) acting on the diver? 3. A 2.0 kg steel ball is dropped on top of a spring attached to the floor from 20 cm above, and compresses it by 5.0 cm before it starts bouncing up again. When the ball touches the spring, it attaches itself to the top of the spring (say, via a magnet on the spring) and thus starts a simple harmonic motion as it bobs up and down on the spring. Assume that the spring is massless, and that the motion is perfectly vertical. a) Calculate the force constant of the spring. b) Calculate the frequency of this simple harmonic motion