Question

h) A stone dropped from the top of a building reaches the ground with a velocity of
49 msl. If the acceleration due to gravity is 9.8 m s2, calculate the time for which
the stone is falling freely.
[Ans: 5 seconds)
A ball is thrown vertically upward with the velocity 20 m/s. Calculate
i)
ii) the time taken to reach the maximum height (taking acceleration due to
gravity g= 9.8 m/s2)
[Ans: a. 20.4 m, b. 2.1 s]​

Answer 1

Answer:

Explanation:

Initial Velocity(u)=0

Final Velocity(v)=49m/s

Acceleration due to gravity=9.8m/s^2

now,

v=u+at

49=0+9.8*t

49/9.5=t

t=52.52secs

Answer 2

Answer:

this is the right answer

Explanation:

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