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3 years ago

13

A model airplane is shot up from a platform 1 foot above the ground with an initial upward velocity of 56 feet per second.

1 answer:

solmaris [256]3 years ago

4 0

$h=-16t^2+56t+1$

The ball will hit the ground when $h=0$ :
$-16t^2+56t+1=0$
$D=b^2-4ac=56^2-4*(-16)*1=3136+64=3200$
$t=\frac{-b-\sqrt{D}}{2a}=\frac{-56-\sqrt{3200}}{-32}=\frac{-56-56.57}{-32}\approx 3.5$

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3 years ago

Suppose that LMN is isosceles with base LN suppose that M

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Julli [10]

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