What is the acceleration of the 5kg block in the pulley and masses problem?

  • Thread starter Thread starter konichiwa2x
  • Start date Start date
  • Tags Tags
    Pulley
AI Thread Summary
The problem involves a 5kg block and a 10kg block connected by a pulley system, with a coefficient of friction of 0.4 between the 10kg block and the surface. The system is released from rest, and the goal is to determine the acceleration of the 5kg block as the 10kg block descends. To solve this, one must analyze the forces acting on both blocks and calculate the tension in the string. The scenario requires considering both cases: whether the 10kg block slips or moves with the 5kg block, and checking for consistency in the calculated accelerations. Understanding the frictional forces and the resulting accelerations is crucial for solving the problem accurately.
konichiwa2x
Messages
81
Reaction score
0
Hi this problem stumps me.

In the figure shown, co-efficient of friction between the block of 10kg and 5kg is 0.4 . There is no friction between the 10kg block and the surface on which it is placed. The system of block is released from rest in the shown situation. Find the distance moved y the block C when block A descends through a distance of 2m.

Please help.I have drawn the FBDs of the blocks. I am sure it is right but I am confused on whether the block of 10kg will move with B or whether they will slip.http://img82.imageshack.us/img82/476/qjn9.png
 
Last edited by a moderator:
Physics news on Phys.org
Start by considering the forces acting within the system. Find the tension in the string.
 
konichiwa2x said:
Please help.I have drawn the FBDs of the blocks. I am sure it is right but I am confused on whether the block of 10kg will move with B or whether they will slip.
Assume either that it does slip, or it doesn't slip, and do the problem. Then check for consistency. If it slips, the 10kg block will have an acceleration you can easily calculate. Is that consistent with the acceleration you find for the 5kg block? If it doesn't slip, the 10kg block has the same acceleration as the 5kg block. Is there enough force available to make that happen?
 

Thread 'Errors and significant figures'

I multiplied the values first without the error limit. Got 19.38. rounded it off to 2 significant figures since the given data has 2 significant figures. So = 19. For error I used the above formula. It comes out about 1.48. Now my question is. Should I write the answer as 19±1.5 (rounding 1.48 to 2 significant figures) OR should I write it as 19±1. So in short, should the error have same number of significant figures as the mean value or should it have the same number of decimal places as...
View full post »
Thread 'Calculation of Tensile Forces in Piston-Type Water-Lifting Devices at Elevated Locations'

Thread 'Calculation of Tensile Forces in Piston-Type Water-Lifting Devices at Elevated Locations'

Figure 1 Overall Structure Diagram Figure 2: Top view of the piston when it is cylindrical A circular opening is created at a height of 5 meters above the water surface. Inside this opening is a sleeve-type piston with a cross-sectional area of 1 square meter. The piston is pulled to the right at a constant speed. The pulling force is（Figure 2）： F = ρshg = 1000 × 1 × 5 × 10 = 50,000 N. Figure 3: Modifying the structure to incorporate a fixed internal piston When I modify the piston...
View full post »
Thread 'A cylinder connected to a hanging mass'

Thread 'A cylinder connected to a hanging mass'

Let's declare that for the cylinder, mass = M = 10 kg Radius = R = 4 m For the wall and the floor, Friction coeff = ##\mu## = 0.5 For the hanging mass, mass = m = 11 kg First, we divide the force according to their respective plane (x and y thing, correct me if I'm wrong) and according to which, cylinder or the hanging mass, they're working on. Force on the hanging mass $$mg - T = ma$$ Force(Cylinder) on y $$N_f + f_w - Mg = 0$$ Force(Cylinder) on x $$T + f_f - N_w = Ma$$ There's also...
View full post »

Similar threads

Analyzing acceleration of block on a ramp connected to a pulley
Replies
15
Views
2K
Time period of SHM & Energy conservation in pulley-spring-block system
Replies
24
Views
3K
Accelerating pulleys (3 pulleys and 3 masses)
Replies
5
Views
2K
What are the accelerations in the multiple-pulley problem?
Replies
10
Views
2K
Why Did I Get the Pulley Tension Forces Wrong?
Replies
12
Views
3K
Static Pulley Problem on an Incline
Replies
9
Views
3K
Find when the acceleration is 0
Replies
15
Views
2K
Calculating Force: Bicycle & Block Mass, Friction Coefficients
Replies
7
Views
2K
Solving 3 Block and Pulley Homework
Replies
1
Views
2K
Atwood with Sliding mass and real pulley
Replies
4
Views
4K

Hot Threads

Recent Insights

Back
Top