physics
posted by Anonymous .
two rock are thrown off the edge of a cliff one is thrown horizont at a speed of 25 m s the other dropped straight down. which stone will hit the ground first? why?

in the vertical direction the motion of the two rocks is identical. They accelerate down with acceleration 9.81 m/s^2
The fact that one of them is moving with constant velocity (there is no force in the x direction) is irrelevant to the motion in the vertical direction
Therefore they hit simultaneously.
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