A rock is thrown upward from the level ground in such a way that the maximum height of its flight is equal to its horizontal range R. At what angle ? is the rock thrown? In terms of its original range R, what is the range Rmax the rock can attain if it is launched at the same speed but at the optimal angle for maximum range? Rmax =  Would your answer to part (a) be different if the rock is thrown with the same speed on a different planet? Yes or No

Physics for Scientists and Engineers with Modern Physics
10th Edition
ISBN:9781337553292
Author:Raymond A. Serway, John W. Jewett
Publisher:Raymond A. Serway, John W. Jewett
Chapter4: Motion In Two Dimensions
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A rock is thrown upward from the level ground in such a way that the maximum height of its flight is equal to its horizontal range R.

At what angle ? is the rock thrown?
In terms of its original range R, what is the range Rmax the rock can attain if it is launched at the same speed but at the optimal angle for maximum range? Rmax = 
Would your answer to part (a) be different if the rock is thrown with the same speed on a different planet? Yes or No 

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