Two blocks and a pulley, friction

  • Thread starter nbaumann
  • Start date
  • #1
2
0

Homework Statement



Two masses are connected by a string which passes over a frictionless, massless pulley. One mass hangs vertically and one slides on a horizontal surface. The horizontal surface has a coefficient of kinetic friction 0.2. The vertically hanging mass is 4.0 kg and the mass on the horizontal surface is 6.0 kg. Find the acceleration of the mass.

Homework Equations



T=mBg-mBa

The Attempt at a Solution



I've basically done this problem without factoring friction, and this my problem, I don't know how to factor friction.

a = (mBg)/(mA + mB) is what I used.


Thanks!!
 

Answers and Replies

  • #2
Hootenanny
Staff Emeritus
Science Advisor
Gold Member
9,621
7

Homework Statement



Two masses are connected by a string which passes over a frictionless, massless pulley. One mass hangs vertically and one slides on a horizontal surface. The horizontal surface has a coefficient of kinetic friction 0.2. The vertically hanging mass is 4.0 kg and the mass on the horizontal surface is 6.0 kg. Find the acceleration of the mass.

Homework Equations



T=mBg-mBa

The Attempt at a Solution



I've basically done this problem without factoring friction, and this my problem, I don't know how to factor friction.

a = (mBg)/(mA + mB) is what I used.


Thanks!!
Welcome to Physics Forums,

You should look again at the tension in the string, is that the only condition that the tension needs to satisfy? What about the other block?
 
  • #3
2
0
Thanks for your reply.

This was really as far as I got. Wouldn't the tension just apply once? As there is only one string?
 

Related Threads on Two blocks and a pulley, friction

  • Last Post
Replies
2
Views
2K
  • Last Post
Replies
1
Views
3K
Replies
4
Views
867
Replies
2
Views
2K
  • Last Post
Replies
21
Views
7K
  • Last Post
Replies
1
Views
3K
  • Last Post
Replies
2
Views
2K
  • Last Post
Replies
3
Views
2K
  • Last Post
Replies
5
Views
2K
  • Last Post
Replies
4
Views
1K
Top