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January 31, 2015

January 31, 2015

Posted by **Dustin** on Friday, September 28, 2007 at 3:43pm.

A model rocket is launched straight upward with an initial speed of 50.0m/s. It accelerates with a constant upward acceleration of 2.00 m/s^2 until its engine stops at an altitude of 150m.

a)What is the maximum height reached by the rocket?

b)When does the rocket reach maximum height?

c)How long is the rocket in the air?

d)With what speed does the rocket hit the ground when it crashes.

- Physics -
**bobpursley**, Friday, September 28, 2007 at 4:00pmd=vo*t +1/2 2 t^2

150=50t +t^2

t^2+50t-150=0

t= (50 +-sqrt (2500+4*1*150)/2

= (50 +- 55.7)/2= a minute.

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