a 2.0 kg brick rides on a 20kg sled and is dragged upa22 degree slope by a rope witha tension of 1000 N. Theropeis parallel totheslope. The friction coefficient(both static and kinetic) between the brick and sled is 0.30 and between the sled and the ground is 0.15. Predict each mass's acceleration. I got 0.8 m/s/s for thebrick which i'm sure is right, and for the sled sled I got 40 m/s but the teacher says it is 45 m/s/s.(adsbygoogle = window.adsbygoogle || []).push({});

Teacher's method:

1000-20(9.8)sin22-0.15(22)(9.8)sin22-5.4=20a

a=45.5m/s/s

My method:

1000-81-30-5.4=22a

a=40m/s/s

**Physics Forums - The Fusion of Science and Community**

# Slope Friction Problem

Know someone interested in this topic? Share a link to this question via email,
Google+,
Twitter, or
Facebook

Have something to add?

- Similar discussions for: Slope Friction Problem

Loading...

**Physics Forums - The Fusion of Science and Community**