1 2.1.3.4.1.5.1.6
You stand on a bridge above a river and drop a rock into the water below from a height of 35 m.
(Assume no air resistance.)
a. What is the acceleration of the rock as it falls? (2 points)
b. How long does it take to hit the water? (4 points)
c. How much more time would it take if instead of dropping the rock straight down, you threw it
horizontally with a speed of 20 m/s? (4 points)
d. You throw another rock at an angle of 65° above the horizontal with a speed of 20 m/s. What
are the x- and y-components of the rock's speed? (3 points)
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e How long does it take the rock to reach its maximum height? (2 points)