Ineed this answered as fast as 15. you want to calculate the displacement of an object thrown over a bridge. using -10 m/s2 for acceleration due to gravity, what would be the total displacement of the object if it took 8 seconds before hitting the water?

Displacement is d  

Vf² = Vi² + 2 g d  

(-20²) = (+10²) + 2 (-9.8) d  

-19.6 d = 300  

d = -15.3 m  

negative means lower

time is t  

d = Vi t + 1/2 g t²

-15.3 = 10 t + (-4.9) t²

4.9 t² - 10 t -15.3 = 0  

t = 3.06 s

Hope this helps -John

you cant move and you feel like someones pushing you down onto your bed it can feel like you want to get up but you just can't it can be extremely scary