Posted by **sammi** on Wednesday, October 15, 2008 at 9:41pm.

i'm not very good at physics and i have an exam tomorrow!!

for the first one do i use the formula F=-Kx to make the answer -4500 ?

and for the second i really have no idea what formula to use

what is the value for k if a spring stretches 0.4m when submitted to a 1800N force?

How much force is needed to keep a 23 kg box moving at a constant velocity across a warehouse floor if the coefficient of friction between the box and the floor is 0.88?

## Answer this Question

## Related Questions

- physics - Hi, my teacher doesn't teach us too well and we have a few packets to ...
- Algebra please help! - I'm very confused with what I'm learning about right now...
- Finacial Accounting. - I am really struggling with this question and my ...
- Grammar - Write one paragraph (150 word minimum) about the most helpful ...
- Physics (Final Review) - Ok so tomorrow is my Physics final and I have so much ...
- English - 1. My math exam is tomorrow. 2. Tomorrow is my math exam. 3. Tomorrow ...
- Physcis - In the process of starting up the car plant, a turbine accelerates ...
- Science - Starting from rest, a boulder rolls down a hill with constant ...
- calculus - really stuck on these two, steps would be greatly appreciated. gotta ...
- Physics - Musicians can use beats to tune their instruments. One flute is ...

More Related Questions