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OpenStudy (anonymous):
a stone is thrown straight downward with initial speed of 8.0 m/s from a height of 25 m. find a. the time it takes to reach the grpund and b. the speed with which it strikes.
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OpenStudy (gschibby):
Do you have the equations in front of you? The ones for constant linear acceleration?
OpenStudy (gschibby):
\[r=r _{0}+v _{0}t+\frac{ at ^{2} }{ 2 }\]
OpenStudy (gschibby):
this is the one you need, r0 is zero so you can scratch that. Then rearrange it for t, and plot in your values ;)
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