Jan and Len throw identical rocks off a tall building at the same time. The groundnear the building is flat. Jan throws her rock straight downward. Len throws his rockdownward and outward such that the angle between the initial velocity of the rock andthe horizon is 30◦. Len throws the rock with a speed twice that of Jan’s rock. If airresistance is negligible, which rock hits the ground first?
Answers: 1
height covered by the object
initial velocity of the object
acceleration due to gravity
time taken by the object to fall the height 
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Jan and Len throw identical rocks off a tall building at the same time. The groundnear the building...
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