In question 3 there is no need to justify your answers. 3. 3A (5 points) The fig

Question

In question 3 there is no need to justify your answers. 3. 3A (5 points) The figure below shows three blocks that are launched from the same level and with the same speed vo . (In the graph, g is the gravitational acceleration.) Block P moves straight upward; block S is launched at an angle to the vertical. Block U is launched along a frictionless ramp. Rank the blocks according to the maximum height they reach. Vo Vo Vo Figure for question 3A ANSWER 3B (5 points) Consider the same situation described in question 3A. Rank the blocks according to their kinetic energy when they pass by the line z zi. Vo Vo Figure for question 3B ANSWER

Explanation / Answer

3A) The maximum height reached depends on the vertical component of the initial velocity. Since block P has the largest vertical initial speed, its maximum height will be the largest

Block S and U will reach the same maximum height since their vertical initial speed is the same

Therefore the ranking of maximum height reached from largest to smallest is

P > S = U

3B) All the three blocks lose the same amount of potential energy when they reach Z1 and their initial kinetic energies are the same. Therefore, the kinetic energies are also the same when they reach Z1

The ranking of kinetic energy when they reach Z1 is

P = S = U

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