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allsm [11]
3 years ago
14

A student drops a pebble from the edge of a vertical cliff. The pebble hits the ground 4 s after it was dropped. What is the vel

ocity of the pebble just before it hits the ground?
A. 20 m/s
B. 40 m/s
C. 60 m/s
D. 80 m/s
Physics
1 answer:
andrew11 [14]3 years ago
5 0

Answer:

B. 40 m/s

Explanation:

v=vo+at

a= 10m/s squared

t=4s

vo=0

v=?

v=4(10)

v=40m/s

-Have a great day!

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