Question

1. From the top of a cliff overlooking a lake, a person throws two stones. The stones have identical initial speeds, but stone 1 is thrown downward at an angle below the horizontal, while stone 2 is thrown upward at the same angle above the horizontal. Neglect air resistance and decide which stone, if either, strikes the water with greater velocity (Answer conceptually)

2. A steel ball is dropped onto a very hard floor. Over and over again, the ball rebounds to its original height (assuming no energy is lost during the collision with the floor). Is the motion of the ball simple harmonic motion?(Answer conceptually)

3. In an amusement park ride , powerful magnets accelerate a car and its riders from rest to 45 m/s in a time of 7.0 sec. The combined mass of the car and riders is 5.5 x 103 kg. Find the average net force exerted on the car and the riders by the magnets. (Include equations , plug in numbers with their units and then arrive at the final answer)

Answer #1

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