6. A 5.0 kg ball is dropped from a height of 3.0 m onto a vertical spring, which has a force constant of 800.0 N/m. How much will the spring compress? 7.A 120 kg skier is going 50.0 m/s at the bottom of the hill. What is the height of the hill? 8. A vertical spring with a spring constant of 900. N/m has been compressed 0.80 m. The vertical spring is then used to launch a 2.0 kg ball straight up into the air. How high will the ball go