Question

a stone thrown vertically upward is caught back by the thrower after 6 seconds. with what velocity was it thrown? How high I did it rise?

Answer 1

it was thrown wth 30m/s

Answer 2

V=u+at
0=u-(10*3)
U=30m/s
While it is falling down
U=0;t=3s;a10m/s^2
S=ut+(1/2)at^2
S=45m