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OpenStudy (anonymous):
A ball is thrown downwards from a height of 5 m. It has a velocity of 30ms^-1 just before it hits the ground. What was its initial velocity.
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OpenStudy (anonymous):
You have the final velocity, the acceleration (due to gravity) and the height. The kinematic equation that relates all of this and allows you to find the initial velocity is: \[v^2 = v^2_0 - 2gd\]
OpenStudy (anonymous):
\(d\) can be replaced by \(h\) of height.
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