Question

A boy standing at the top of a tower of 20 m heigh
drops a stone. Assuming g = 10 ms?, the velocity
with which it hits the ground is
(1) 5.0 m/s
(2) 10.0 m/s
(3) 20,0 m/s
(4) 40.0 m/s
​

Answer 1

Answer:

3

Explanation:

2*g*h= v^2-u^2

for free fall u=0m/s

400=v^2

v=20

Answer 2

Answer:

using formula

2as=v^2 - u^2

Explanation:

2×10×20 = v^2 - 0^2

400 = v^2

v = 20 m/s