How Do You Calculate Mass M1 in a Frictionless Pulley System?

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SUMMARY

The discussion focuses on calculating the mass M1 in a frictionless pulley system where mass M2 (6.00 kg) accelerates downwards at 3.61 m/s². The angle of inclination θ is 30.0°, and the coefficient of kinetic friction μk is 0.490. Participants emphasize using free body diagrams and the equations of motion, specifically F=ma, to analyze the forces acting on both masses. The solution involves breaking down the forces into components along and perpendicular to the incline.

PREREQUISITES
  • Understanding of Newton's second law (F=ma)
  • Knowledge of free body diagrams
  • Familiarity with trigonometric functions (sine and cosine)
  • Concept of kinetic friction and its coefficient (μk)
NEXT STEPS
  • Study the application of free body diagrams in pulley systems
  • Learn how to resolve forces into components using trigonometric functions
  • Explore the effects of friction in inclined plane problems
  • Practice solving dynamics problems involving multiple masses and pulleys
USEFUL FOR

Students studying physics, particularly those focusing on mechanics, as well as educators seeking to enhance their teaching methods for dynamics involving pulley systems.

jeremy04
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Homework Statement



The pulley is light and frictionless. Find the mass M1, given that M2 (6.00 kg) is moving downwards and accelerates downwards at 3.61 m/s2, that θ is 30.0°, and that μk is 0.490.

Homework Equations



F=ma
F||=mg*cos(theta)
Fper=mg*sin(theta)

The Attempt at a Solution



I have no idea where to start this problem..

I know how to find F|| and Fperendicular when there's no pulley/no friction.. no idea where to start..



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Take the freebody diagram of M1... write [tex]\Sigma\vec{F_x} = m\vec{a_x}[/tex] and [tex]\Sigma\vec{F_y} = m\vec{a_y}[/tex] where x is along the plane, and y is perpendicular to the plane.

similarly write an F=ma equation for M2.
 

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