Masses and inclined plane with friction

In summary, the task is to calculate the magnitude of the acceleration for a system consisting of two masses, m1 and m2, connected by a string. One mass is on a flat horizontal plane and the other is on an inclined plane at 40 degrees. The masses and their respective static and kinetic friction coefficients are given. Using the equations F=ma and F=Fg-Fk, a solution can be found by setting up a diagram of all the forces acting on each body and using the fact that the tension in the string is equal in magnitude for both masses. Solving for the tension and acceleration in each equation and adding them together will result in the desired values.
  • #1
nynja
3
0

Homework Statement


What is the magnitude of the acceleration of the system, and what is the tension on the string.

The setup is there is 2 masses m1 and m2 which are connected by a string. One is on top of a flat horizontal plane, while the other is on an inclined plane with angle 40 degrees.

m1 mass = 2.65kg
m1 static friction = .61
m1 kinetic friction = .47
m2 static friction = .53
m2 kinetic friction = .36
m2 mass = 9. kg


if it matters the picture looks like this

________________
\
\
\
\
\
____________________\m2 is on this incline

Homework Equations


F=ma
F=Fg-Fk



The Attempt at a Solution


I have tried to calculate the acceleration for each of the masses but it is not the right answer I am almost absolutely stuck on this problem. Again I want to understand so a push in the right direction would be perfect
 
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  • #2
Do for each body a diagram of all the forces and have in mind that the force T from string will be equal in magnitude for both bodies (though T will have different direction, for body 1 will be horizontal while for body 2 will be inclined 40degrees).

For body 1 it will be [tex]T-.47m_1g=m_1a[/tex] where a is the acceleration which is common for both bodies.
Find the equation for body 2 and then you ll have two equations with 2 unknowns which are T and a.
 
  • #3
Thank you for the quick reply :)

So if I understood you correctly the tension for mass 2 is:
T-.36mg sin(40) = m2a

Then do I solve for T in both equations and add them together to get the magnitude?
Same for the acceleration, but if I remember correctly acceleration is the same for the entire system?

Thanks again
 

1. What is the relationship between mass and the force required to move an object on an inclined plane with friction?

The force required to move an object on an inclined plane with friction increases as the mass of the object increases. This is because the weight (or force due to gravity) of the object also increases with mass, and this weight must be overcome by the force applied to move the object up the inclined plane.

2. How does the angle of the inclined plane affect the force required to move an object with a given mass?

The steeper the angle of the inclined plane, the greater the force required to move an object with a given mass. This is because a steeper angle means the weight of the object is acting more perpendicular to the surface of the incline, making it more difficult to overcome with the applied force.

3. How does friction impact the movement of an object on an inclined plane?

Friction acts in the opposite direction of the applied force, making it more difficult to move an object up an inclined plane. This means that more force is required to overcome the force of friction and move the object up the incline. As the angle of the incline increases, the force of friction also increases.

4. Can the mass of an object affect the coefficient of friction on an inclined plane?

Yes, the mass of an object can affect the coefficient of friction on an inclined plane. The coefficient of friction is a measure of how rough or smooth the two surfaces are in contact with each other. A heavier object may have a greater surface area in contact with the inclined plane, increasing the coefficient of friction and making it more difficult to move the object.

5. How does the presence of friction on an inclined plane affect the acceleration of an object?

The presence of friction on an inclined plane reduces the acceleration of an object. This is because some of the applied force is used to overcome the force of friction, leaving less force available to accelerate the object. In the absence of friction, the object would accelerate at a faster rate.

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