Thursday, December 4, 2014

Physics Chap 4 Numbered Heads Test Review Concepts

1.      Explain the relationship between the motion of an object and the net external force acting on the object.  Understand and be able to apply Newton’s First Law to situations involving an object at rest or in motion.

2.     What is net force?  Draw and analyze a force diagram to determine net force.


3.     What is equilibrium?  What are the two ways in which an object can be in equilibrium?

4.     Be able to calculate the acceleration of an object of known mass caused by a known net force (Newton’s Second Law).   If the net force is doubled while the mass stays the same, by how much does the acceleration change?  If the mass is doubled while the net force stays the same, by how much does the acceleration change?   


5.     Be able to identify action-reaction pairs of forces and apply Newton’s Third Law to determine the magnitude and direction of the forces.

6.     Explain the difference between mass and weight.  Be able to calculate weight in Newtons from a mass in kg.


7.     What is normal force?  Be able to determine the magnitude and direction of normal forces.

8.     Explain the difference between static and kinetic friction.  Use coefficients of friction to calculate frictional force.  Be able to determine frictional force for an object in equilibrium or an object with a known acceleration.

9.     What is tension?  Be able to analyze a force diagram to determine the tension in a rope pulling on an object.


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