PH 122 Lecture Notes - Wave, Electrical Energy, Gravitational Potential
Document Summary
There are only a limited number of forces. We"ll learn about a few more in this class. We"ll spend a good deal of time talking about em waves in this class. We will usually describe forces using a field model. Same thing, but new kind of potential energy. A proton (mass 1. 67 x 10-27 kg) experiences a force 1. 00 x 10-10 n to the right. (a typical magnitude. ) 1. 67 x 10 27 kg a = 6 x 1016 m s2. At this acceleration, how long would it take the proton to reach the speed of light? (artificial but instructive question. ) a = F = kq 1q2 r2 k electrostatic constant. Q2 charge 2 r distance between the charges. A child on a swing is motionless at the highest point of her arc. A skier moves down a slope at a constant speed. Depends on g gravitational field h distance.
