Went around the room and asked what the students told their parents about yesterday's class.
Handed back RA 4.1 and went over it. It took a long time.
Newton's First Law - An object at rest will remain at rest and a moving object will continue moving in a straight line with constant speed unless acted on by an outside net force.
Showed the students that a mass of 1 kg weighs 10 N on Earth.
Introduced free-body diagrams - a picture that shows ONLY the forces that act ON an object.
Showed helium balloon on cart demo.
Finished with ballistic cart demo.
Tomorrow we will do the quiz on inertia and the free-body diagram worksheet.
Thursday, March 19, 2009
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