Pulley and Blocks: Is My Answer Correct?

  • Thread starter Thread starter hquang001
  • Start date Start date
  • Tags Tags
    Blocks Pulley
AI Thread Summary
The discussion focuses on the calculations involving two blocks connected by a pulley system. The user derives equations for the tensions and accelerations of the blocks, ultimately expressing the acceleration of block m2 as a2 = m2g / (4m1 + m2) and that of block m1 as a1 = 2m2g / (4m1 + m2). Other participants confirm the correctness of these calculations. The consensus indicates that the user's approach and final answers are accurate. The thread highlights the importance of proper application of Newton's laws in solving pulley problems.
hquang001
Messages
31
Reaction score
3
Homework Statement
In term of m1, m2 and g, find the acceleration of each block. There is no friction anywhere in the system
Relevant Equations
∑F= ma
1 1.png
155434234_755501075359888_7661044753117238048_n.jpg

  • Block m2:
    m2g - 2T = m2a2 (1)
  • Block m1:
    ∑F= ma
    T= m1a1 = m1.2a2 (2)

    Cancel T in (1) and (2) I have :
    m2g = a2 (4m1 + m2) => a2 = m2g / (4m1 + m2)

    => a1 = 2m2g / (4m1 + m2)
Is my answer correct ? Thank you
 
Physics news on Phys.org
Your work looks correct to me.
 
TSny said:
Your work looks correct to me.
Thank you
 
Thread 'Minimum mass of a block'
Here we know that if block B is going to move up or just be at the verge of moving up ##Mg \sin \theta ## will act downwards and maximum static friction will act downwards ## \mu Mg \cos \theta ## Now what im confused by is how will we know " how quickly" block B reaches its maximum static friction value without any numbers, the suggested solution says that when block A is at its maximum extension, then block B will start to move up but with a certain set of values couldn't block A reach...
TL;DR Summary: Find Electric field due to charges between 2 parallel infinite planes using Gauss law at any point Here's the diagram. We have a uniform p (rho) density of charges between 2 infinite planes in the cartesian coordinates system. I used a cube of thickness a that spans from z=-a/2 to z=a/2 as a Gaussian surface, each side of the cube has area A. I know that the field depends only on z since there is translational invariance in x and y directions because the planes are...
Back
Top