PSC 101 Lecture Notes - Inertial Frame Of Reference, Parabolic Trajectory, Momentum
1 Dec 2013
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Document Summary
Scalar- a quantity that is just a number with no direction. Vector- a quantity with direction and magnitude. This law is also called the law of inertia: states that a force acting on a body is equal to the acceleration of that body times its mass. Thus, if one body exerts a force f on a second body, the first body also undergoes a force of the same strength but in the opposite direction. To change ->p, need to apply an external force over some time interval. Case 1- f = constant over change in t. Case 2- f changes magnitude but not direction of t1-t2. Conservation of linear momentum: in the absence of any net external force, the momentum of a system remains unchanged. Collisions- for two objets (1,2) colliding between before (i), after (f) (m1v1) + (m2v2) = (m1v1)f + (m2v2)f. Works for elastic and inelastic collisions work = force/distance potential energy- kinetic energy.
