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

Two blocks attached by a string (see figure) slide down a 20° incline. Block 1 has mass m1 = 0.65 kg and block 2 has mass m2 = 0.30 kg. In addition, the kinetic coefficients of friction between the blocks and the incline are 0.30 for block 1 and 0.20 for block 2.

(a) Find the magnitude of the acceleration of the blocks.

m/s2

(b) Find the tension in the string.

N

2. Relevant equations

Where do I go from here?

3. The attempt at a solution

Mass 1

F_{g}=9.81*.65=6.38 N

F_{gx}= F_{g}sin(20)

=6.38sin(20)=2.18 N

F_{gy}=F_{g}cos(20)

=6.38cos(20)= 5.995 N

F_{kinetics}=m_{k}*F_{N}

=.3*5.995=1.7985 N

Mass 2

F_{g}=9.81*.3=2.94 N

F_{gx}=2.94sin(20)=1.006 N

F_{gy}=2.94cos(20)= 2.76

F_{kinetics}= .2*2.76= .552 N

I believe I have all of the numbers needed, I just do not know how to solve for the answers using these numbers.

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

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

# Homework Help: Two blocks on an Incline w/ Friction

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