Question

Velocity-time graph of a freely falling stone is given below

a) Find the velocity of the stone in 3 s?
b) At what time did the stone attain a velocity of 50 m/s?​

Answer 1

Answer:

a)v= 15 m/s

b)t=5s

Explanation:

a) For motion with constant acceleration velocity over a period of time is given by the average velocity over that period and is same at each point during that period.

v between 0s and 3 s = (0+30)/2= 30/2= 15 m/s

b) From graph we find that

at t=5s velocity is 50m/s