Terry dropped a pebble from the top of his apartment building. The pebble impacted the ground after falling for 2.2 seconds. Cal

Question

2 years ago

11

culate the final velocity of the pebble at impact with the street below. -4.45 m/s -21.5 m/s -23.7 m/s -9.8 m/s

1 answer:

Contact [7] · Answer 1 · 2022-11-24T16:16:36+03:00

The final velocity of the pebble as it hits the ground is 21.5 m/s.

We have to use the equation;

v = u + gt

Where;

v = final velocity

u = initial velocity

g = acceleration due to gravity

t = time

Since the pebble was dropped from a height, u =0 m/s, hence,

v = gt

v = 9.8 ms-2 × 2.2 s

v = 21.5 m/s