Question

WILL GIVE MEDAL AND FAN!~~~A rock is dropped from a height of 2.5 meters. What is its velocity when it reaches the ground?
3.5 meters/second
7.0 meters/second
12 meters/second
14 meters/second
49 meters/second

Answer 1

7 meter per second.

Answer 2

its initial velocity is zero and its acceleration is g.
u can now use the equation
v^2-u^2=2as
where v=final velocity
u=initial velocity
s=distance travelled
a=acceleration

Answer 3

\[2gh= V _{f}^{2} - V ^{2}_{i}\] here V f is the final velcoity which we have to find. and V i is the initail velocity. initail velocity is zero.

Answer 4

How did you get that?

Answer 5

2(9.8) ( 2.5) = Vf ^ 2

Answer 6

V ^2 = 49 By taking suqare root of both sides we have.... V = 7 m/s

Answer 7

Thanks @Rohitkhanna @IhteshamMalik

Answer 8

You're welcome