Friday

April 17, 2015

April 17, 2015

Posted by **Desperate!!!!** on Saturday, February 18, 2012 at 1:42pm.

- Calculus -
**john**, Saturday, February 18, 2012 at 4:34pmv(t)=s'(t)=150-32t

set s(t)=200 find out when the rock is 200 feet above the ground.

200=150t-16t^2

t=(5/16)+or-(15-sqrt(97))

0=150t-16t^2

t=75/8 not 0 because it started on the ground

the velocity when it strikes the ground is v(75/8)=-150

the other velocity is v((5/16)+or-(15-sqrt(97)))=304.387 or -24.836

**Answer this Question**

**Related Questions**

Math-Help - A rock is tossed straight up into the air. The height h (in feet) t ...

calculus 1 - A rock is dropped off the edge of a cliff its distance S (in feet) ...

algebra - a rock is thrown into the air from a height of 4 feet. the height of ...

Math - For this problem, a person standing on the edge of a cliff throws a rock ...

algebra - Rock is thrown from the top of a building. The formula h=-16t+234 ...

Calculus - A rock is dropped from the top of a 400-foot-tall building. Its ...

algebra 1 - h=-16t2+20t+24 gives the height h of the rock after t seconds. how ...

Physics - a rock is thrown straight up which of the following statemetns ...

Calculus Help Please!!! Check - If a rock is propelled upward from the surface ...

Calculus Help Please!!! Check - If a rock is propelled upward from the surface ...