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?
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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
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