Newton's 3rd law
When one object exerts a force on a second object, the second object exerts a force on the first that is equal in magnitude but opposite in direction
sliding friction
the force between surfaces in relative motion
net force
the vector sum of all applied and frictional forces on an object
electromagnetic force
the force that results from a basic property of particles called electric charge
Newton's 1st law
an object with no net force acting on it remains at rest or moves with constant velocity in a straight line
terminal velocity
the constant velocity reached by a falling object
inertia
the tendency of an object to remain either at rest or in constant motion
gravitational force
an attractive force that exists between all objects
inertial mass
the ratio of the net force exerted on an object and its acceleration is the object's _______
weak force
the force that is involved in the radioactive decay of some nuclei
coefficient of friction
in determining the force of friction, the constant that depends on the nature of the two surfaces in contact
gravitational mass
an object's ______ is found by comparing the gravitational force on the object with the gravitational force on an object of known mass
strong nuclear force
the force that holds the particles in the nucleus together
friction
the force that opposes motion between two surfaces that are in contact
Newton's 2nd law
the acceleration of a body is directly proportional to the net force on it and inversely proportional to its mass
force
a push or pull
drag force
the friction-like force caused by air resistance
static friction
the force between surfaces that opposes the start of motion
newton
a unit of force, is equal to the amount of force that causes a mass of one kilogram to accelerate at a rate of one meter per second squared
action-reaction force
the pair of opposite but equal forces that two objects exert on each other
weight
the gravitational force exerted by a large body, usually Earth, on an object
kinematics
the study of how objects move
dynamics
the study of why objects move as they do