Newtons pulley question

In summary, the question involves two blocks connected by a string and a pulley. Using Newton's laws, the tension of the string is found to be 5.24 N. An example for solving pulley problems can be found in the provided PDF.
  • #1
13
0

Homework Statement


[PLAIN]http://img703.imageshack.us/img703/3580/12p71.jpg [Broken]
m1 = 1,378 g. It is free to move along a horizontal, frictionless surface. This block is connected to a second block with mass of m2 = 872 g by a massless string that extends around a massless, frictionless pulley. Find the tension of the string.

Homework Equations



F net = ma since the system is not at equilibrium.

The Attempt at a Solution



So for m1,
Tension (T) = 1.378 kg*a.

for m2,
mg-T = m2*a
T = 8.55 N - 0.827 kg*a

since tension is equal at any point along the string, i equated both equations and isolate acceleration;
1.378 kg*a = 8.55 N - 0.872 kg*a
a = 3.8 m/s^2.

therefore T = 1.378 kg * 3.8 m/s^2 = 5.24 N.

did i approach this question properly?
 
Last edited by a moderator:
Physics news on Phys.org
  • #2
Looks good to me. If you go <a href="https://www.physicsforums.com/showthread.php?t=220910">here</a>, there's an example for pulleys in the pdf.
 
  • #3
oops, no html. just cut and paste.
 

1. What is Newton's pulley question?

Newton's pulley question is a physics problem that involves a pulley system and two masses connected by a string. The goal is to determine the acceleration of the masses and the tension in the string.

2. How do you solve Newton's pulley question?

To solve Newton's pulley question, you can use Newton's second law of motion, which states that the net force acting on an object is equal to its mass multiplied by its acceleration. By setting up and solving equations using this law, you can determine the acceleration of the masses and the tension in the string.

3. What are the key concepts involved in Newton's pulley question?

The key concepts involved in Newton's pulley question include Newton's second law of motion, forces such as tension and gravity, and the concept of equilibrium, where the net force on an object is zero.

4. Can you provide an example of a Newton's pulley question?

One example of a Newton's pulley question is as follows: A 5 kg mass is attached to one end of a string that runs over a pulley. On the other side of the pulley is a 10 kg mass. If the pulley has negligible mass and friction, what is the acceleration of the masses and the tension in the string?

5. How is Newton's pulley question relevant in real life?

Newton's pulley question is relevant in real life in various situations, such as determining the acceleration and tension in elevator systems, calculating the force required to lift objects using a pulley system, and understanding the mechanics of simple machines like cranes and pulley systems used in construction and manufacturing processes.

Back
Top