You tossed a five-peso coin upward with a velocity of +1.47 m/s. Neglecting

Question

air resistance, find the maximum height reached by your coin.You tossed a five-peso coin upward with a velocity of +1.47 m/s. Neglecting
air resistance, find the maximum height reached by your coin.

Answer 1

why did you say everything twice?
v^2 = 2as
s = v^2/2a = 1.47^2/19.6 = 0.11m

or, since v = 1.47-9.81t, v=0 at t=0.1498s
h = 1.47*0.1498 - 4.9*0.1498^2 = 0.11 m
so, about 11cm