Newton's Laws with a Pulley, with tension, Force

In summary, the conversation discusses a problem involving finding the tension in a string given the force and mass of objects and assuming frictionless surfaces. The conversation also mentions using the equation F=ma and calculating weight force components. The attempted solution includes an equation for the 2kg block and the suggestion to convert mass to weight and calculate the weight force component acting down the plane. The trigonometric function used is found to be incorrect and further steps are needed to calculate the weight component acting parallel to the plane.
  • #1
mandragora
1
0

Homework Statement


If F = 8.0 N and M = 1.0 kg, what is the tension in the connecting string? The pulley and all surfaces are frictionless.
16aznmv.jpg



Homework Equations


F=ma


The Attempt at a Solution


8-T=2a (2kg block)
T - 1cos10? = 1a (for the 1kg block. I got stuck here, the angle threw me off)

Thanks!
 
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  • #2
mandragora said:

Homework Statement


If F = 8.0 N and M = 1.0 kg, what is the tension in the connecting string? The pulley and all surfaces are frictionless.
16aznmv.jpg



Homework Equations


F=ma


The Attempt at a Solution


8-T=2a (2kg block)
this is good
T - 1cos10? = 1a (for the 1kg block. I got stuck here, the angle threw me off)

Thanks!
You must first convert mass to weight, and calculate the weight force component acting down the plane (the weight acts straight down, and you can find its components parallel to and perpendicular to the incline). Your trig function is incorrect,,,you will have to do a little geometry to calculate the weight component acting parallel to the plane.
 

Related to Newton's Laws with a Pulley, with tension, Force

1. What are Newton's Laws?

Newton's Laws refer to three fundamental principles of physics that explain the relationship between an object's motion and the forces acting upon it.

2. How do Newton's Laws apply to a pulley system?

Newton's First Law states that an object will remain at rest or in motion at a constant velocity unless acted upon by an external force. In a pulley system, the pulley itself exerts a force on the object, causing it to move. This demonstrates Newton's First Law.

Newton's Second Law states that the acceleration of an object is directly proportional to the net force exerted on it and inversely proportional to its mass. In a pulley system, the mass of the object will affect the acceleration due to the force exerted by the pulley. This shows Newton's Second Law in action.

Newton's Third Law states that for every action, there is an equal and opposite reaction. In a pulley system, the tension in the rope on one side of the pulley is equal to the tension on the other side, showing the equal and opposite reaction described in Newton's Third Law.

3. What is tension in a pulley system?

Tension refers to the pulling force exerted by a rope, string, or cable on an object. In a pulley system, the tension on one side of the rope is equal to the tension on the other side, as the tension is transmitted through the pulley to both sides.

4. How does the force of gravity affect a pulley system?

The force of gravity, represented by the symbol "g", affects the acceleration of an object in a pulley system. The greater the mass of the object, the greater the force of gravity acting on it, which in turn affects the acceleration of the object.

5. Can Newton's Laws be applied to other systems besides a pulley?

Yes, Newton's Laws can be applied to any system that involves forces and motion. These laws are fundamental principles of physics and can be used to explain a wide range of phenomena, from the movement of celestial bodies to the behavior of fluids and gases.

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