A police radar gun operates at a frequency of 10.5 GHz.The offi cer, sitting in a patrol car at rest by the highway,directs the radar beam toward a speeding car traveling80 mph directly away from the patrol car. What is thefrequency shift of the refl ected beam, relative to theoriginal radar beam?
Chapter 17 Notes Sec. 1: Newton’s First Law: If no force acts on a body, then the body’s velocity cannot change Newton’s Second Law: F = ma Newton’s laws of motion allow us to analyze many kinds of motion Conservation of energy Ki +Ui = Kf +U f In an isolated system where only conservative forces cause energy changes, the kinetic energy and potential energy can change, but their sum cannot change Gravitational and electro-magnetic forces: this what we experience!!! Frictional force, spring force, normal force, tension force in a string, aerodynamic force … are results of electromagnetic force Sec. 2 An electric charge has a magnitude and sign. It is either positive or negative. Electron has negative electric charge. Proton has positive e