Chapter 12: Forces and Motion

the overall force acting on an object after all the forces are combined

a force that opposes the motion of objects that touch as they move past each other

the friction force that acts on objects that are not moving

a force that opposes the direction of motion of an object as it slides over a surface

the friction force that acts on rolling objects

opposes the motion of an object through a fluid

fluid friction acting on an object moving through the air

force that acts between any two masses

the constant velocity of a falling object when the force of air resistance equals the force of gravity

the motion of a falling object after it is given an initial forward velocity

the tendency of an object to resist a change in its motion

measure of the inertia of an object and depends on the amount of matter the object contains

the force of gravity acting on an object

the product of an object's mass and its velocity

if no net force acts on a system, then the total momentum of the system does not change

is associated with charged particles

a powerful force of attraction that acts only on the neutrons and protons in the nucleus, holding them together

an attractive force that acts only over a short range

an attractive force that acts between any two masses

center-directed force that continuously changes the direction of an object to make it move ina circle