Tension of string between two blocks

Click For Summary
To find the tension in the string connecting two blocks with different masses and forces applied, first calculate the acceleration of the system using F=ma. The net force acting on the system is the difference between the forces applied to each block. Once the acceleration is determined, use it to find the tension in the string by applying the formula for tension, which is the mass of one block multiplied by the acceleration. It's important to consider the direction of forces and ensure that the calculations account for both blocks. Understanding the relationship between force, mass, and acceleration is key to solving this problem.
stosw
Messages
19
Reaction score
0

Homework Statement


a 3.4 kg block A and 6.0 kg block Bvec are connected by a string of negligable mass. Force FA = (12 N) acts on block A; force FB = (24 N) acts on block B. What is the tension in the string?

http://img25.imageshack.us/img25/2610/imagepn.jpg

Homework Equations



F=ma

The Attempt at a Solution



I've tried adding the forces given because they're in the same direction. I've tried subtracting the forces, but that's obviously not how to go about doing this problem.

I've solved the acceleration for each block, but I honestly don't know what to do for this problem. Could someone give a hint or two at what to do? Thanks.
 
Last edited by a moderator:
Physics news on Phys.org
Do your some of forces for the x and y direction for both boxes.

Force of tension=mass1*a
 
The book claims the answer is that all the magnitudes are the same because "the gravitational force on the penguin is the same". I'm having trouble understanding this. I thought the buoyant force was equal to the weight of the fluid displaced. Weight depends on mass which depends on density. Therefore, due to the differing densities the buoyant force will be different in each case? Is this incorrect?

Similar threads

Replies
21
Views
848
Replies
2
Views
1K
Replies
4
Views
1K
  • · Replies 8 ·
Replies
8
Views
2K
  • · Replies 47 ·
2
Replies
47
Views
3K
Replies
13
Views
3K
  • · Replies 2 ·
Replies
2
Views
2K
Replies
1
Views
2K
  • · Replies 2 ·
Replies
2
Views
4K
  • · Replies 5 ·
Replies
5
Views
3K