# college

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If a man leans over a cliff and throws a rock upward at 4.9 m/s. Neglecting air resistance, what is the rock's speed one second later?

• Physics??? -

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• college -

v1 = velocity one second later
vi = initial velocity of rock = 4.9 m/s
t = time in seconds
g = acceleration due to gravity = -9.8 m/s^2
v1 = vi + gt

Plug the numbers in and solve for v1.

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