Question

A stone is dropped from the edge of a roof
a) how long does it take to fall 4.9 m?
b) how fast does it move at the end of the fall?
c) what will be its acceleration after 1 sec and after 2 sec? ​

Answer 1

Answer:

b

Explanation:

bec it does not end of the fall

Answer 2

A

If a stone is falling freely in gravitational field of earth then it will expiernce acceleration of g = 9.8 m/s2. Answer: From h = 1/2gt^2 , where intial velocity is zero, put g = 9.8m/sec^2, and h = 4.9 m as per your question, you get the value of t=1 sec