A stone is thrown with an initial speed of 15 m/s at an angle of 53 above the horizontal from the top of a 40-m building. If g = 9.8 m/s2 and air resistance is negligible, then what is the magnitude of the horizontal component of velocity as the rock strikes the ground?
A) 7.5 m/s
B) 9.0 m/s
C) 12 m/s
D) 29 m/s
Correct Answer:
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