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# Phys Sci - Chap 12

### vocabulary words

force push or pull that acts on an object
newton SI unit for force, = to the force that causes a 1 kg mass to accelerate at a rate of 1 m per second squared
net force overall force acting on an object after all the forces are combined
friction force that opposes the motion of objects that touch as they move past each other
static friction friction force that acts on objects that are not moving
sliding friction friction force that opposes the motion of an object as it slides over a surface
rolling friction friction force that acts on rolling objects, caused by the change in shape at the point of rolling contact
air resistance fluid friction acting on an object moving through the air
gravity attraction between any two objects because of their masses
terminal velocity constant velocity of a falling object when the force of air resistance equals the force of gravity
projectile motion curved path of an object in free fall after it is given an initial forward velocity
inertia tendency of an object to resist a change in its motion
mass measure of the inertia of an object, which depends on the amount of matter the object contains
weight force of gravity acting on an object
momentum product of an object's mass and its velocity
law of conservation of momentum law stating that the total momentum of a system does not change if no net force acts on the system
electromagnetic force force associated with charged particles, which has two aspects, electric force and magnetic force
strong nuclear force powerful attractive force that binds protons and neutrons together in the nucleus
weak nuclear force powerful attractive force that acts over a short range
gravitational force attractive force that acts between any two objects
centripetal force force that continuously changes the direction of an object to make it move in a circle
Created by: msparks