Mechanics need to get facts straight

In summary: It is difficult to give a summary when you are asking for multiple things at once.In summary, the conversation covers the concepts of an object on an incline with an angle of X, the normal force, the forces parallel and perpendicular to the incline, and the force of friction. The formula for the resistance of a wire with changes in temperature is also mentioned, as well as the question of whether diffraction is a property of all waves.
  • #1
UrbanXrisis
1,196
1
Need to get some facts straight.

A block on an incline with an angle of X...
the normal force is mg
the force parallel to the incline is mgSinX
the force perpendicular to the incline is mgCosX
and the force done against friction is mgCosX?
 
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  • #2
Need to get some facts straight.

A block on an incline with an angle of X...
the normal force is mg
the force parallel to the incline is mgSinX
the force perpendicular to the incline is mgCosX
and the force done against friction is mgCosX?
Little of what you put made sense, but I'll tell you what I can.

A block of mass [itex]m[/itex] initially at rest on an incline of angle [itex]\theta[/itex] with coefficient of static friction [itex]\mu[/itex] has:

Force of gravity straight down into the plane, with magnitude [itex]mg[/itex].
Component of force of gravity perpendicular to and into the plane, with magnitude [itex]mg\cos \theta[/itex].
Normal force, [itex]F_N[/itex], counterbalancing that previous force, perpendicular to and out of the plane, with magnitude [itex]mg\cos \theta[/itex].
Component of force of gravity parallel to and down the plane, with magnitude [itex]mg\sin \theta[/itex].
Force of friction parallel to and up the plane of magnitude [itex]\mu F_N = \mu mg\cos \theta[/itex].
 
  • #3
okay, what is the formula for resistance of a wire that includes change in temperature?
 
  • #4
UrbanXrisis said:
okay, what is the formula for resistance of a wire that includes change in temperature?
http://hyperphysics.phy-astr.gsu.edu/hbase/electric/restmp.html
 
  • #5
Is diffraction a property of all waves?
 
  • #6
These rapid fire questions you are asking can all be researched within a matter of miliseconds, either by glancing at your text, or google.
 

1. What is meant by "getting facts straight" in mechanics?

"Getting facts straight" in mechanics refers to accurately understanding and interpreting the physical laws and principles that govern the behavior of objects in motion. This includes correctly applying equations and formulas to solve problems and making precise measurements.

2. Why is it important for mechanics to get facts straight?

It is important for mechanics to get facts straight because small errors or inaccuracies in calculations can have significant impacts on the outcome of an experiment or the performance of a machine. Inaccurate data can also lead to incorrect conclusions and hinder the progress of scientific research.

3. What are some common misconceptions in mechanics that can lead to incorrect facts?

Some common misconceptions in mechanics include assuming that objects in motion always have a constant velocity, neglecting the effects of friction and air resistance, and overlooking the role of external forces in determining an object's motion. These misconceptions can result in incorrect interpretations of data and inaccurate predictions.

4. How can mechanics ensure that they have accurate facts?

Mechanics can ensure that they have accurate facts by carefully designing experiments, making precise measurements, and using reliable equipment. They should also double-check their calculations and seek out multiple sources of information to verify their results.

5. How does getting facts straight contribute to the advancement of mechanics?

Getting facts straight is crucial for the advancement of mechanics because it allows scientists to build upon existing knowledge and make accurate predictions about the behavior of objects in motion. By understanding the fundamental principles of mechanics, scientists can make breakthroughs in fields such as engineering, physics, and technology.

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