You toss a quarter straight up. It takes about 2.6 seconds for it to land back on your hand at the same height you tossed it. Find the speed at which you tossed the quarter.

Answer 1

Tr = 2.6/2 = 1.3 s = Rise time.

V = Vo + g*Tr.
V = 0 @ max h.
g = -9.8 m/s^2.
Tr = 1.3 s.

Vo = ? (m/s).

Answer 2

just multiply the a(t) so
9.8(1.3)=12.74 and just keep it positive