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AP Physics 1 U7 - WS 3 - Energy & Momentum page 1 Unit 7 - Momentum 2/21/2020 Problems 1-5: To the right is a side view of a cliff, which is frictionless except for the area indicated. The cliff ends with an incline at 0-30, An 8 kg block is 10 m 430.6 placed at a height h above the ground and released. h 1. If h is 80 m, what happens to the block and where 40 m does it end up? Be precise. 70 m 2. If h is 100 m, what happens to the block and where does it end up? Be precise. 3. If h is 110 m, what happens to the block and where does it end up? Be precise. 4. What is the minimum height the block would have to be released from so that it leaves the cliff? 5. How would your answer to #4 change if the mass were doubled? Problems 6-8: Now consider a similar situation as before, except that there is a second block of mass 12 kg located after the friction zone, but before the ramp. 10 m m, 6. If mi is released from 140 m and collides completely ......)e h inelastically with my, what happens to them and where 40m do they end up? Be precise. 70 m 7. What is the minimum height mi would have to be released from if the blocks collide completely inelastically for them to just leave the cliff? 8. Would your answer to #7 change if m, were doubled? Explain thoroughly. Problems 9-12: A roller coaster car is released from a height hy, collides completely inelastically with another car at the bottom of a frictionless track. The two cars rise to a height hz. 9. In terms of the essential variables, what is hz? ... h h2 mz 10. Derive an expression for the amount of dissipated energy during the collision. 1 1. What is h2 in terms of h, if the masses are identical? 12. What fraction of the total energy is lost in the collision if the masses are identical