Question

A stone is dropped from the edge of a roof.a) how long it takes to fall 4.9m?b)how fast does it move at the end of that fall? C) how fast does it moves at the end of 7.9m?d)what is the acceleration after 1s and after 2s?

Answer 1

Answer:

a)1 sec. , b) 9.8m/s ,c) 12.44, d) 9.8m/s^2

Explanation:

a )s=(a(t^2))/2

4.9×2/g=t^2

t=√9.8/9.8

b)at end of 4.9m

it will travel at velocity

v=√2×9.8×4.9= 9.8

c)similar to b

d ) acceleration due to gravity is constant

=9.8

Answer 2

Answer:

your answer

Explanation:

hope this helps you