Question

An object dropped from a cliff falls with a constant acceleration of 10m/s square find its speed 2 sec after it was dropped

Answer 1

First we need to find the distance...by
s=ut +1/2 at²
Here..
u= 0
t= 2
a= 10

Then put the values
s= 20
Then speed after 2 secs is
s/t
20/2
I think its 10 m/s