Question

: A stone is gently dropped from a height of
20m. If its velocity increases uniformly at the
rate of 10 m/s2. With what velocity and after
what time will it strike the ground ?
(A) 20 m/s, 20 s (B) 20 m/s, 2 s
(C) 10 m/s, 2 s (D) 10 m/s, 20 s​

Answer 1

Answer:

b)20m/s,2s

Explanation:

s=20m

a=10m/s^2

u=0

v^2-u^2=2as

v^2-0^2=2(10)(20)

v^2=2(200)

v^2=400

v=√400

v=20s

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v=u+at

20=0+10t

20/10=t

2=t

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Answer 2

Answer:

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