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On a level football field a football is projected from ground level. It has speed 8.0...

On a level football field a football is projected from ground level. It has speed 8.0 m/s when it is at its maximum height. It travels a horizontal distance of 70.0 m. Neglect air resistance.  How long is the ball in the air?

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Answer #1

Given that the football has a speed of 8m/s when it is at maximum height.

At maximum height vertical velocity becomes zero

So horizontal velocity,

Horizontal distance traveled by the football,

Find the time of flight

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Consider the horizontal motion of the football

There is no acceleration in horzontal direction, so horizontal velocity remains constant.

Horizontal velocity = Horizontal Distance/Time of flight

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