# physics freefall question

Anonymous

Question description

Due to an unfortunate mechanical failure with your spaceship, you find yourself stranded on another planet. With little to do, you decide to toss a rock vertically into the air. The rock leaves your hand with an upward initial velocity vi and you catch it 6.60 seconds later. Thanks to the markings on your spaceship, you're able to determine that the rock reaches its maximum height 39.0 meters above the point it left your hand. Assume that you release the ball, and catch it at the same height above the ground. You can also neglect air resistance and assume that the acceleration due to gravity for the planet is constant.

(a) Find the amount of time (in seconds) it takes the rock to reach its maximum height after it leaves your hand.
s

(b) What is the magnitude of the acceleration due to gravity on this planet? (Give your answer in m/s2)
m/s2

(c) What is the magnitude of the initial velocity of the rock? (Give your answer in m/s)
m/s

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