SOLUTION: Catapults fire projectiles that form a parabolic path. The height(h) in metres above the ground t seconds after the projectile leaves the catapult is given by the formula h=-4.9t^2
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Question 121033: Catapults fire projectiles that form a parabolic path. The height(h) in metres above the ground t seconds after the projectile leaves the catapult is given by the formula h=-4.9t^2 +4.2t+8.Use the quadratic formula to find the length of time the projectile is in the air before it hits the ground.
Answer by ankor@dixie-net.com(22740) (Show Source): You can put this solution on YOUR website!
Catapults fire projectiles that form a parabolic path. The height(h) in metres above the ground t seconds after the projectile leaves the catapult is given by the formula h=-4.9t^2 +4.2t+8.Use the quadratic formula to find the length of time the projectile is in the air before it hits the ground.
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That looks like a very slow projectile, anyway
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h = 0 when it strikes the ground so we have:
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-4.9t^2 + 4.2t + 8 = 0
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Use the quadratic formula: a=-4.9; b=4.2 c=8
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t = 1.775 second
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