Reflection: Developing a Conceptual Understanding Something About Sigma: Calculating Net Force - Section 3: Net Force (sigma F) and Free-Body Diagrams


It is essential to relate the concepts of net force to the diagram which students completed for homework and was reviewed earlier in the lesson (pictured below).   

I noticed that some students don't always make the connection between the net force and the resulting motion on an object.  So I have added a column to the Net Force worksheet that forces students to think about and connect the state of an objects velocity (constant - changing) to the net force acting on it.  This was not on the original sheet I gave to the students because it is dawning on me how important it is that students always connect the ideas of balanced/unbalanced forces to the state of an objects motion.  

I tell the students that application of this chart is 90% of the unit!  If they always remember to apply this chart, they are on the right track.  I even make a giant chart and posted it in my classroom so that we could refer to it at anytime.

  Net Force Reflection - Relate it to motion and velocity!
  Developing a Conceptual Understanding: Net Force Reflection - Relate it to motion and velocity!
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Something About Sigma: Calculating Net Force

Unit 1: Forces in One Dimension
Lesson 2 of 11

Objective: Students will determine the net force acting on a single object and relate that to its motion.

Big Idea: Free body diagrams are a useful tool to understand all of the forces acting on an object and the resulting objects motion.

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2 teachers like this lesson
Science Skills, Science, Newton's First Law, Physical Science, Newton's Laws, Newton's Second Law, Newton's Third Law, friction, physics, net force, sigma, free body diagram, FBD, inertia, kinematics, Forces
  55 minutes
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