Pulleys relating to physics question

In summary, the conversation discusses a two body system consisting of a 0.25kg object accelerating across a rough surface. The object is attached to a 0.1kg object suspended over a pulley by a string. The coefficient of kinetic friction is given as 0.183. The task is to calculate the acceleration of the block and the tension in the string. The solution involves using the equations Fg=mg and Fnet=ma, and making the assumption that ff=fg. By plugging in the given values, the acceleration is calculated to be 1.502025m/s^2 and the tension in the string is calculated to be 0.4488075N.
  • #1
moe6142
6
0
Diagram
kkk.jpg


Homework Statement


Consider the two body system above. There is a 0.25kg object accelerating across a rough surface. The sliding object is attached by a string to a 0.1kg object which is suspended over a pulley. the coefficient of kinetic friction is 0.183. Calculate the acceleration of the block and the tension in the string.

Homework Equations


Fg=mg
Fnet=ma

The Attempt at a Solution



i got the acceleration to be 1.5...m/s^2 i don't know if it is right

fn=fg=mg 0.25 x9.81m/s^2 =2.4525N
ff=ufn
ff=0.183 x 2.4525N =0.4488075 ff=fg since fn=fg

fg2= 0.1 x 9.81 =0.981 then subtracted them to get fnet then divided by the total mass to get 1.502025m/s^2
=0.4488075N
 
Last edited:
Physics news on Phys.org
  • #2
How did you get that answer? What exactly did you do? Can you please post your working?
 

1. How do pulleys work?

Pulleys work by using a wheel with a grooved rim and a rope or cable that runs along the groove. The rope is connected to an object on one end and a force on the other end. When the rope is pulled, the wheel turns and the object is lifted or moved.

2. What is the purpose of using multiple pulleys in a system?

Using multiple pulleys in a system allows for the force needed to move an object to be spread out over several ropes. This can make it easier to lift or move heavier objects.

3. How do pulleys affect the amount of work needed to move an object?

Pulleys can make it easier to move an object by reducing the amount of force needed. However, the same amount of work is still required to move the object, as the force is spread out over a longer distance.

4. Can pulleys change the direction of the force applied?

Yes, pulleys can change the direction of the force applied. For example, a pulley system can be used to lift an object straight up, even if the force is applied horizontally.

5. How do pulleys affect the mechanical advantage of a system?

Pulleys can increase the mechanical advantage of a system by spreading out the force needed to move an object. The more pulleys used in a system, the greater the mechanical advantage will be.

Similar threads

  • Introductory Physics Homework Help
Replies
1
Views
2K
  • Introductory Physics Homework Help
Replies
8
Views
1K
  • Introductory Physics Homework Help
Replies
20
Views
2K
  • Introductory Physics Homework Help
Replies
7
Views
1K
  • Introductory Physics Homework Help
Replies
8
Views
1K
  • Introductory Physics Homework Help
Replies
5
Views
1K
  • Introductory Physics Homework Help
Replies
6
Views
4K
  • Introductory Physics Homework Help
Replies
10
Views
1K
  • Introductory Physics Homework Help
Replies
10
Views
2K
  • Introductory Physics Homework Help
Replies
4
Views
11K
Back
Top