Torque pulley homework help

  • Thread starter cryptoguy
  • Start date
  • #1
134
0

Homework Statement


Two blocks are connected by a string of negligible mass passing over a pulley of radius .25 m and moment of inertia I. Block 1 is on an incline of 37 degrees and block 2 is hanging down. The hanging mass is accelerating down at 2 m/s^2. Find I. (I already know tensions T1 and T2)

Homework Equations



Tnet = I*[tex]\alpha[/tex]

The Attempt at a Solution



T1(incline block) = 118 N, T2(hanging block) = 156 N
So,
.25*156-.25*118cos(37) = I(2/.25)

I think you need the cos(37) because T1 (on the incline) has a vertical component that does not contribute to the torque. Is that correct?
 

Answers and Replies

Related Threads on Torque pulley homework help

  • Last Post
Replies
8
Views
7K
  • Last Post
Replies
1
Views
2K
Replies
2
Views
715
Replies
1
Views
2K
Replies
3
Views
19K
  • Last Post
2
Replies
34
Views
451
  • Last Post
Replies
17
Views
7K
  • Last Post
Replies
6
Views
3K
  • Last Post
Replies
1
Views
2K
  • Last Post
Replies
1
Views
2K
Top