A ball is thrown vertically upward from ground level with an initial velocity of 80 feet per second. The ball's h height after t
seconds is given by the equation h = −16t2 + 80t. How long will it take for the ball to hit the ground?
2 answers:
Answer:
A
Step-by-step explanation:
It only takes 5 seconds friend.
Answer:
<u>The ball will take 5 seconds to hit the ground.</u>
Step-by-step explanation:
The ball's h height after t seconds is given by the equation h = −16t² + 80t
When the ball hit the ground, the height will be zero.
∴ h = −16t² + 80t = 0
∴ −16t² + 80t = 0 take t as common
t ( -16t + 80) = 0
∴ t = 0 Or -16t + 80 = 0
-16t + 80 = 0
-16t = -80
t = -80/-16 = 5 seconds
<u>So, The ball will take 5 seconds to hit the ground.</u>
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