Speed it Up
The physics of motion is all about forces. Forces need to act upon an object to get it moving. Motion won’t just happen on its own. So how is all of this motion measured? Physicists use some basic terms when they look at motion. Velocity is a value for the basic speed of an object. That speed is achieved after the action of a force. Acceleration is a twist on the idea of velocity. Acceleration is a measure of how much the velocity of an object changes. Velocities could either increase or decrease over time. Mass is another big idea in motion. Mass is the amount of something there is in grams (or kilograms). A car has a greater mass than a baseball.