PHYS 2211 Lecture Notes - Lecture 1: Pickup Truck, Headon, Friends House
Document Summary
A vector is a value that has direction. All measurements made in other science courses have been scalar in that only values are needed. Suppose that two cars collide while one is moving at 60 mph and the other is moving at 59 mph. It depends on if the two cars meet head-on or if the faster car rear-ends the slower car. Identical numbers before the collision but two totally different results. Direction must be considered in many of the problems of physics. A vector is a measurement that has a number and a direction. The number part of a vector is called. You could say that it is the scalar part of the vector. The direction part is usually given as an angle. We will investigate angles more in tomorrow"s lesson. For today, directions like forward, backwards and sideways will do. Jimmy joe has a bunch of rotten eggs that he needs to get rid of.
