Masses and inclined plane with friction

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SUMMARY

The discussion focuses on calculating the acceleration and tension in a system involving two masses, m1 (2.65 kg) on a horizontal plane and m2 (9 kg) on a 40-degree inclined plane. The coefficients of static and kinetic friction for both masses are provided, with m1 having a static friction of 0.61 and kinetic friction of 0.47, while m2 has static friction of 0.53 and kinetic friction of 0.36. The equations of motion derived from Newton's second law (F=ma) are utilized to establish relationships between tension (T) and acceleration (a) for both masses, leading to a system of equations that can be solved simultaneously.

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  • Understanding of Newton's laws of motion
  • Familiarity with friction coefficients and their implications
  • Ability to set up and solve systems of equations
  • Knowledge of trigonometric functions related to inclined planes
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  • Learn how to derive equations of motion for systems involving multiple bodies
  • Study the effects of friction on inclined planes in physics
  • Explore the concept of tension in strings connecting masses
  • Practice solving simultaneous equations in physics problems
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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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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.
 
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
 

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