PHYS 6A Lecture 12: Lecture 12
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If there are only conservative forces acting (gravity/spring force), energy is concerned. There are two frictionless ramps, the initial and final heights are the same. One block is curved down and the other is straight. Both blocks arrive at the right hand end with the same speed. An object is released from the edge of the building with height h. This would give you the same answer as the energy argument! It is going to be the same. It is dependant on the height (y direction remains same and so does energy) Problem: force f=50n yields a spring extension x 1 of 3. 5cm. What is x if an applied force is 7. 0n. K and u have to equal e. Some k, more u (has to add up to e) Eliminate graphs where k and u do not add up to e. At highest point, it has a speed in the x direction.