77. Assuming the horizontal velocity of the ball is constant, the horizontal displacement
is
ΔΔ
x
v t
=
where
Δ
x
is the horizontal distance traveled,
Δ
t
is the time, and
v
is the (horizontal)
velocity. Converting
v
to meters per second, we have 160 km/h = 44.4 m/s. Thus
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 Spring '06
 Stoler
 Physics, Speed of light, Orders of magnitude, Miles per hour, Kilometre, horizontal velocity, 1 kilometre

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