A golfer hits a ball from ground level with an initial vertical velocity of 80 ft/s. After how many seconds will the ball hit the ground?

Question

anonymous · Answer

I suppose air resistance is not considered. In that case, gravity is the only force working on the ball, and no energy is lost to friction from the air. Because of this (and this is not true in reality where air resistance is present) we know that the ball has the same speed at the same point on its way down, because acceleration stays the same throughout.

asnaseer · Answer

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