Why Am I the Only Girl in My Electro Engineering Class?

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SUMMARY

The discussion centers on the physics problem of determining the force required to keep block B stationary on an incline in an electro engineering class. The solution involves calculating the force F within the bounds defined by the equations Mg(tanø*y)/(1+y*tanø) < F < Mg(tanø+y)/(1-y*tanø), where ø represents the angle of the incline and y denotes the friction coefficient between blocks A and B. The participants emphasize the importance of understanding the forces acting on block A, including gravitational and frictional forces, to solve the problem effectively.

PREREQUISITES
  • Understanding of basic physics concepts, particularly forces and friction.
  • Familiarity with trigonometric functions, specifically tangent (tan) and sine (sin).
  • Knowledge of Newton's laws of motion.
  • Basic calculus for analyzing forces and motion on inclined planes.
NEXT STEPS
  • Study the principles of static and kinetic friction in physics.
  • Learn about inclined plane problems in classical mechanics.
  • Explore Newton's laws of motion and their applications in engineering.
  • Investigate the role of angles in force calculations, particularly in inclined planes.
USEFUL FOR

This discussion is beneficial for physics students, particularly those studying engineering, as well as educators seeking to understand common challenges faced by students in mechanics. It also aids anyone interested in the application of physics principles in real-world engineering scenarios.

Tesla11
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Only girl on electro engineering :(

Hello! This is my first post but not the last! :D
I'm a student at norwegian universety and I really have difficulty with phisics

Here's my question (look at attacment)


How big force F has to be so that B doestn't change position (doesn't flys over and doesn't fells down)?

Answer is this:

Mg(tanø*y) Mg(tanø+ y)
------------ < F< -----------
1+y*tanø 1-y*tanø

ø=angle
y=friction ( between A and B)


I'm not very proud to say that I used 10 hours in the row on this, so any help will be very appreciated!
 

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Welcome to PF.

Consider then the forces acting on the block A, with mass call it m, along the plane of the incline.
Gravity wants it to slide down at m*g*sinθ
Friction wants to hold it at μ*m*g*cosθ

Now what about your force F ?

How much is it accelerating the system of A and B?

Then what components of that force are increasing friction? and what component is wanting to push it up the incline?
 


Hi! I am a newcomer too... So welcome:P
Where is the Force apllied? To the A body? To the B? To none of these?
 

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