# Answer on Mechanics | Relativity Question for GFKLJK

Question #60639

2. What...is the potential energy of the ball at part I (see figure 1) if the following is true: A 25.0 kg ball rolls off a 3.0 meter, frictionless ramp, inclined at 30.0º onto a level, frictionless floor for 25.5 seconds. Then it rolls up another frictionless ramp of equal degree and 3.5 meters in length. What is the kinetic energy of the ball at the part I/part II boundary? What is the work done in part I and in part II? What is the total work done on the system from start to finish? What kind of potential energy is described in part I? If the 2nd ramp in part III were only 2.5 m, at what velocity (remember, speed and direction) will the ball leave the ramp? Now, take a 25.0 kg ball that rolls along a flat, frictionless surface, and has to reach the end of the 5.5 meter frictionless ramp elevated 1.5 meters (part II to part III in figure 2). What is the angle made with the horizontal (i.e. At what angle is the ramp tilled)?

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