I could really use some help. I've been looking at this problem for a week now and am getting nowhere. If I could just find a little more info(like the spring constant, or spring mass) I can solve the problems. Here it is: A launcher uses a spring assemble to launch balls in the air. It has two settings, one where the assembly is pushed back 5 cm and the second pushed back 10cm. On the second setting (10cm) a 10g ball goes 1.6m straight up. On the same setting a 100g ball goes 1.25m up. On the first setting, the 10g ball goes 0.65m up. 1. Why doesnâ€™t the 10g ball go 10x as high as the 100g ball? 2. When the spring is on the second setting why doesnâ€™t the ball rise 4x as high as the first setting? 3. What is the spring constant? 4. What is the effective mass of the spring assembly? 5. How much is the spring compressed when the ball leaves the launcher? 6. How high would a 60g ball go up if it were launched at the first setting? 7. Whatâ€™s the speed of the 100g ball as it leave the launcher straight up, on the second setting? 8. If the 100g ball were launched horizontally from the second setting, what would its speed be? The spring must be compressed after the balls leave, but how do I find how much? Why would the horizontal speed be different from the vertical speed right after launching (questions 7 and 8)?