- #26

learningphysics

Homework Helper

- 4,099

- 5

Friction acts opposite the direction of motion... ie it tries to stop motion.why is it - friction and not +?

ok soTy - Wy + Ny = may

[tex]Tsin(\theta) - mg + N = 0[/tex]

So your two equations are:

[tex]Tcos(\theta) - friction = ma_x[/tex]

[tex]Tsin(\theta) - mg + N = 0[/tex]

I also know that friction is uk*N, and I can plug in T and theta so:

[tex]10.6cos(15) - \mu_k*N = ma_x[/tex]

[tex]10.6sin(15) - mg + N = 0[/tex]

The unknowns in this equation are N and ax... you have two equations 2 unknowns... you should be able to solve a...