(adsbygoogle = window.adsbygoogle || []).push({}); 1. The problem statement, all variables and given/known data

http://i50.tinypic.com/r8gfba.png

^That is the image I got in class

m1=500kg

m2=1500kg

m3=10kg

f1=600n

angle near f1=25 degrees

coefficient of kinetic friction=.25

Find effective weight of m3 in side of elevator

Find force required to keep the elevator at constant velocity

2. Relevant equations

All I know is Ft=ft for both

I have a feeling f1 is either sin25(600) or cos25(600)..I don't know what 'effective weight' really means

3. The attempt at a solution

Would m1 just be 9.81(500) since it's going straight up and down..does Fn=Fg here?

For the second part, I know I probably have to set a to zero, but I can't do that when I don't know where to start

1. The problem statement, all variables and given/known data

2. Relevant equations

3. The attempt at a solution

**Physics Forums | Science Articles, Homework Help, Discussion**

Join Physics Forums Today!

The friendliest, high quality science and math community on the planet! Everyone who loves science is here!

The friendliest, high quality science and math community on the planet! Everyone who loves science is here!

# Homework Help: Forces problemfind effective weight of mass (3 masses)

**Physics Forums | Science Articles, Homework Help, Discussion**