Question

a ball is thrown vertically upwards with the speed of 30m/s if the stone reachs the maximum height of 10m , calculate the time taken to reach the maximum height and velocity of stone at that point . ​

Answer 1

Answer:

Initial speed=u=28m/s

Final velocity at maximum height=v=0m/s

a=g=10m/s

2

A) maximum height attained by stone=u²/2g=28×28/2×10=39.2m

B) time=t=u/g=28/10=2.8sec

t1=2.85−1=1.85

V=u+at

=28−(10)(1.85)=28−18.13=9.87m/s

Hence the velocity is 0.87 m/s

c) No it will not change .

Because after 1-sec final velocity becomes zero for any initial velocity...

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