Question

a boy throws a stone upwards with velocity of 60m/s how long will it take to reach the max height g=-10m/s2

Answer 1

maximum height=u²/2g
or. h=60²/2*10
or. h=180 meter.

now t=u/g (v=0)
& t=60/10=6 sec.

Answer 2

V=0 m/s
U=60 m/s
g=-10m/s2
t=?
We know, v=u+gt
So,
0=60+(-10)t
0=60-10t
-60/-10=t
t=6 s
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