If a ball with an original velocity of zero is dropped from a tall structure and it takes 7 seconds to hit the ground, what velo

Question

Dafna1 [17]

3 years ago

6

If a ball with an original velocity of zero is dropped from a tall structure and it takes 7 seconds to hit the ground, what velo

city does the ball have when it reaches the ground? A. 34.3 m/s B. 68.6 m/s C. 156.8 m/s D. 240.1 m/s

Physics

2 answers:

Colt1911 [192] · Answer 1 · 2022-02-01T06:22:23+03:00

The velocity of the ball when it reaches the ground is equal to B. 68.6 m/s. This value was obtained from the formula Vf = Vi + at. Vf is the final velocity. Vi is the initial velocity. The acceleration is "a", while the time of travel is "t". The solution is:

<span>Vf = Vi + at
</span>Vf = 0 + (-9.8 m/s^2) (7 s)
Vf = -68.6 m/s

The negative sign denotes the direction of the ball.

Tatiana [17] · Answer 2 · 2022-02-01T08:12:50+03:00

Tatiana [17]3 years ago

5 0

If a ball with an original velocity of zero is dropped from a tall structure and takes 7 seconds to hit the ground, what velocity does the ball have when it reaches the ground?

A. 68.6 m/s

B. 34.3 m/s

C. 240.1 m/s

D. 156.8 m/s