D. No simple relationship exists between v I and v 2 becaue we do not know the 3

Question

D. No simple relationship exists between v I and v 2 becaue we do not know the 3. You are standing on a skateboard, initially at rest. A friend throws a very heavy bel towards you. You can either catch the object or deflect the obijoct back towards you friend (such that it moves away from you with the same speed as it was origimally thrown). What should you do in order to MINIMIZE your speed on the skateboand? A. Deflect the ball. B. Catch the ball. C. Your final speed on the skateboard will be the same regardiess whether you catch the ball or deflect the ball

Explanation / Answer

1) The point at which potential energy can be taken as zero depends on the reference or datum line. Below that line, we have negative potential energy. Therefore, it is possible to have negative potential energy. Option B seems correct.

2) It would be option option A (V1 = V2) . The reason is velocity is path independent and also both the slides have same height and velocity at the bottom is given by

V = SQRT(2*g*h) .....As we can say velocity depends only on height not on the path.

3) In order to minimize the speed, we must add mass and therefore we must catch the ball, it will be like an inelastic collision where two objects stick together. In that case, final velocity will be less. Therefore, option B seems correct.

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