Centripetal Force

After studying the material of this chapter, you should be able to:
1. Calculate the centripetal acceleration of a point mass in uniform circular motion given the radius of the circle and either the linear speed or the period of the motion.
2. Identify the force that is the cause of the centripetal acceleration and determine the direction of the acceleration vector.
3. Use Newton's laws of motion and the concept of centripetal acceleration to solve word problems.
4. Distinguish between centripetal acceleration and tangential acceleration.


Friction:

1. Know the difference between static and kinetic friction   
• Be able to Graphically show the relationship between them
2. Measure coefficient of static friction from experimental data collected                           
3. Measure coefficient of kinetic friction from experimental data collected                                                                 
4. Define expected trends in the different frictional coefficients for different types of surfaces    
                     
    

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DAY 20

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• Practice Kinematics

Mechanical Systems

Draw a picture with all the forces acting upon it.  (F.B.D)

Assign a direction to be positive.  (F.O.R) + usually     preferred  for the direction of acceleration.

Write a relationship for the sum of the forces 

          in the x and y direction.

Substitute and solve for unknown terms

this may need to be done repeatedly

In a system that includes Multiple Bodies:

        write the equation for each body

        write an equation for the combined system

* Note:  If objects are bound, they must share the same                             motion but not necessarly the same force.