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A ball is thrown horizontally from a high cliff with a velocity of 5 m/s. Ignoring the slowing of the ball due to air resistance (and assuming the ball is still falling), what will be the horizontal velocity of the ball 3 seconds later? A. 0 m/s B. 5 m/s C. 9.8 m/s D. 15 m/s

Respuesta :

AL2006
If there's no air resistance, then there are no horizontal forces on the ball.
With no horizontal force, there's no horizontal acceleration, so the horizontal speed never changes.  From the time it's tossed until it hits the ground, its horizontal speed is the same 5 m/s. (B)
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so the answer to this is going to be 

B

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