Posted by **Anonymous** on Sunday, November 27, 2011 at 7:55pm.

a projectile is launched straight up with an initial velocity of 112 feet per second. how long would it take to reach 180 feet?

- physics -
**Henry**, Monday, November 28, 2011 at 8:21pm
d = Vo*t + 0.5g*t^2 = 180,

112t - 16t^2 - 180 = 0,

Divide both sides by 4:

28t - 4t^2 - 45 = 0,

-4t^2 + 28t - 45 = 0.

X = 2.5s. Use Quadratic Formula and use

the smaller of the 2 solutions.

## Answer This Question

## Related Questions

- intermediate algebra - A projectile is launched directly upward from the top of ...
- math - A projectile is fired directly upward with a muzzle velocity of 860 feet ...
- math - You are standing on a bridge over a creek, holding a stone 20 feet above ...
- math - an object is launched from ground level with an initial velocity of 400 ...
- algebra - An object that is projected straight downward with initial velocity v ...
- algebra - An object that is projected straight downward with initial velocity v ...
- Algebra: Quadratic Functions - if a rocket is launched straight up into the air ...
- math - If a projectile is launched from a platform 30 feet high with an initial ...
- math - A rocket is fired straight up from the ground with an initial velocity of...
- algebra - You throw a tennis ball up in the air from an initial height of 4 feet...

More Related Questions