- #1
hm8
- 16
- 0
Homework Statement
Three blocks are connected on the table as shown below. The table is rough and has a coefficient of kinetic friction of 0.420. The objects have masses of 4.00 kg, 1.00 kg and 2.00 kg, as shown, and the pulleys are frictionless.
Determine the acceleration of each object and their directions.
Homework Equations
F=ma
Ffriction=mu*normal force
The Attempt at a Solution
I made positive in the direction i think everything is moving...counterclockwise.
Fsystem = msystem*a
m1g-Ffriction-m2g = (m1+m2+m3)a
m_1g-(mu*m2g)-m2g = (m1+m2+m3)a
a = (m1g-(mu*m2g)-m2g)/(m1+m2+m3)
I plugged everything in and got 2.74 m/s^2.
I think it's okay that I ignored tension and made everything one system...although maybe I'm wrong about that.
It also could be that I got the answer right, and my teacher entered the wrong answer for our online homework thing so it's telling me I got it wrong...
Last edited: