A bullet is fired horizontally from a height of 78.4 m and hits the ground 2400 m away. With what velocity does the bullet leave the gun?

Question

Physics

Paige Hayden

2 July, 15:14

A bullet is fired horizontally from a height of 78.4 m and hits the ground 2400 m away. With what velocity does the bullet leave the gun?

+3

Answers (1)

Know the Answer?

Kalan · Answer 1

We have

y=78.4 m and the distance, x=2400 m

we need to find out the time in the air, t=√2y/a

where a is 9.8 m/s²

t=√ 2 * (-78.4) / - 9.8 m/s² = √ - 156.80 / - 9.8 = √16=4s

speed of the bullet will be

v=x/t = 2400/4 = 600m/s