Use a(t) = -32 feet per second per second as the acceleration due to gravity. (neglect air resistance.) -with what initial velocity must an object be thrown upward (from ground level) to reach the top of the washington monument (approximately 550 feet)?

u= 187.61 ft/s

Explanation:

Given that

g= - 32 ft/s²

The maximum height ,h= 550 ft

Lets take the initial velocity = u ft/s

We know that

v²=u² + 2 g s

v=final speed ,u=initial speed ,s=height

When the object reach at the maximum height then the final speed of the object will become zero.

That is why

u²= 2 x 32 x 550

u²= 35200

u= 187.61 ft/s

That is why the initial speed will be 187.61 ft/s

option number c is the right answer.