11/6/08
Post date: Nov 05, 2008 8:51:40 PM
Bell Activity: What does the word "impulse" mean?
Impulse-Momentum theorem
If a constant force is applied to something over a period of time, we call the product of force and time the impulse
If the mass of an object is constant, then the impulse is equal to the change in momentum of the object
Equation: Force x time = change in momentum or Force x time = mass x change in velocity
See page 177 for the symbols in this equation
Example: A baseball being hit by a bat (page 178)
Application question: Why are we taught to follow through when we swing a bat?
Practice: Page 178, problems 2-4 due Friday
Page 178: 1-4 Due Friday