Posted by **Justin** on Sunday, October 8, 2006 at 3:27pm.

*I am lost on a bunch of different problems, and this is one of them. Please note that I am NOT asking for final answers, just some guidance so that I can figure out how to do the problem!!! I know that a lot of times on this site it is commented that we are fishing for answers, but I just need some guidance on some stuff I honestly cannot figure out how to do, no matter how easy it might seem to others.

You throw a 19.0 N rock into the air from ground level and observe that, when it is 11.0 m high, it is traveling upward at 25.0 m/s.

Use the work-energy principle to find the rock's speed just as it left the ground.

Answer expressed in m/s.

Use the work-energy principle to find the maximum height the rock will reach.

Answer expressed in m.

Energy at ground= PEat11meters + KE at 11 meters.

Solve that for energy at the ground.

AT max height.

energyground= PE at max height= mgh

solve for h.

## Answer this Question

## Related Questions

- Physics - *I am lost on a bunch of different problems, and this is one of them. ...
- Physics - *I am lost on a bunch of different problems, and this is one of them. ...
- Physics - *I am lost on a bunch of different problems, and this is one of them. ...
- Physics - *I am lost on a bunch of different problems, and this is one of them. ...
- Physics - *I am lost on a bunch of different problems, and this is one of them. ...
- Easy (yet confusing) Algebra - These problems are pretty easy, but confusing (as...
- Physics - If an object is hung from a cable with a weight of 40 N, what is the ...
- Math - I have a matrix with brackets around [7 6 ][13] [14 -6] [8] and i know ...
- Math - I'm doing some word problems on finding the areas of rectangles, its just...
- Math 115 - I need help with these problems 1. 18kg=______g I don't understand ...