SOLUTION: when a ball is thrown straight up into the air. the formula h=vt-16t2 gives the height h of the object above ground after t seconds. Its initial velocity is given as v. a) after

Algebra ->  Finance -> SOLUTION: when a ball is thrown straight up into the air. the formula h=vt-16t2 gives the height h of the object above ground after t seconds. Its initial velocity is given as v. a) after       Log On


   

Question 1179746: when a ball is thrown straight up into the air. the formula h=vt-16t2 gives the height h of the object above ground after t seconds. Its initial velocity is given as v.
a) after how many seconds will the object hit the ground if it is thrown with a velocity of 96 feet per second?
b) what should be the initial velocity of the object if you want the ball to hit the ground in 10 seconds?
Answer by ewatrrr(24785) About Me  (Show Source):
You can put this solution on YOUR website!

Hi
a) h = 96t - 16t^2  = 16t(6 - t) = 0 ,  t = 6sec
b)  v*(10) - 16*10^2 = 0 
      v = 1600/10 = 160ft/sec

Wish You the  Best in your Studies.