- #1
Austin Chang
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Homework Statement
A ball is thrown horizontally from the top of the cliff of height H. It hits the ground a distance H from the bottom of the cliff. What was the initial speed?
X coordinate
v0 = ?
a = 0 m/s2
x0 = 0
xf = H
Y coordinate
v0
a = -9.8 m/s2
y0 = H
yf = 0
Homework Equations
a(t) = a
v(t) = v0 + at
s(t) = x0 + v0t + 1/2*at2
The Attempt at a Solution
H = 0 + v0t
0 = H + 0 + 1/2 * (-9.8) t2
-H = 1/2*(-9.8)
H/4.9 = t2
(H/4.9)1/2 = t