Question #3e15b

1 Answer
Sep 4, 2016

Answer:

19.8 = 9.81 t t=2.01 secs

Explanation:

#0 - v = g (t-t_0)#
where t is the time at which the maximum height is reached, after the stone is thrown upward, at time #t_0#. The time taken is of course the difference and we get
#19.8 = 9.81(t-t_0)#
or
#t = 2.01# secs, as we are free to set #t_0 = 0# secs. Maximum height is the point where the height ceases to increase, and therefore the vertical velocity is #0# m/s.