Please Help Me.. will give medal
A ball is thrown straight into the air from 80 feet above ground level with an initial velocity of 40 feet per second. Give answers correct to the nearest hundredth

When will the ball hit the ground? Explain how you used your graphing calculator to find the answer.

Question

Please Help Me.. will give medal 
A ball is thrown straight into the air from 80 feet above ground level with an initial velocity of 40 feet per second. Give answers correct to the nearest hundredth

When will the ball hit the ground? Explain how you used your graphing calculator to find the answer.

retireed · Answer

The ball goes straight up and then down to the ground.  Assume the guy is on a building.

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retireed · Answer

Physics is a not really very strong a the present time.

Distance = Initial Distance + Initial Velocity - Gravity

    0 = 80 feet + 40t feet/sec - 0.5 (32.2)t^2 ft/sec^2    Solve for t

I am not 100% confident in the effect of gravity     I found   (1/2) a t^2  

Looking through the 1976 Physics book.  I don't think gravity has change much since then.

anonymous · Answer

thank you so much :)