Neglect air resistance in this question. If you drop a ball from a height of 4.9 m, it will hit the ground 1s later. If you fire a bullet exactly horizontally from a height of 4.9 m, it will also hit the ground 1s later. Explain.

Question

Physics

John Callahan

23 October, 10:31

Neglect air resistance in this question. If you drop a ball from a height of 4.9 m, it will hit the ground 1s later. If you fire a bullet exactly horizontally from a height of 4.9 m, it will also hit the ground 1s later. Explain.

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Answers (1)

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Mathew Blackwell · Answer 1

The time at which an object from from rest depends on air resistance, the height, gravity.

Since the question says we should neglect air resistance and both the ball and the bullet are from the same height they will get to the ground and the same time since they are both fired on earth which has the same gravity ...

H=ut+1/2gt^2.

For an object dropping from a height the initial velocity is zero, therefore u=0m/s.

The formula becomes

t=√ (2H/g)

So the time and object get to the ground depends on the height from the ground and gravity ...

So since no air resistance they will get to the ground together.