OUTCOME
By the end of the lesson you will review the concept of net Force, equilibrium and be able to apply these concepts to compound force problems to solve for the compenent forces
Free body diagrams are sued to illustrate forces acting on an object
The net force of an object at rest is zero and the object is described as in equilibrium
LEARNING TASKS
Explain
Watch these screencasts on HOW TO determine the net force (both 1 and 2 dimensional problems)
When is an object in equilibrium?
Why are the two horizontal components of of the tension in the rope the same?
Why is the addition of the vertical components equal to Nellies weight?
Explore and Elaborate
Draw a free body diagram of yourself sitting in your chair right now!
complete the practical task and answer the questions
Prac: Net forces
Evaluate
Try the following questions from the text
Ex 10.2 Qs 6-11
Reading for next lesson: p. 325-329