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#### karush

##### Well-known member

- Jan 31, 2012

- 2,719

*initial velocity*must an object be thrown upward (from ground level) to reach the top of the Washington Monument (approximately $550$ft.)

well since $f(t)=-16t^2+V_0 t+S_0$ then $550=f(t)$

also, that $f'(0)=V_0$ and $f''(t)=-32$

this is supposed to be solved by using integration but I don't see how this is done without knowing what $t$ is. any suggest?

answer is $187.617\frac{ft}{sec}$