a push or pull that acts on an object
the force that causes a 1-kilogram mass to accelerate at a rate of 1 meter per second each second
the overall force acting on an object after all 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
the friction force that acts on rolling objects
the friction force that opposes the motion of an object through a fluid
the 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 motion
the amount of matter an object contains
the measure of the force of gravity on an object
the product of an object's mass and velocity
law of conservation of momentum
the total momentum of a closed system does not change
a force associated with charged particles, which has two aspects, electric force and magnetic force
strong nuclear force
a powerful force of attraction that acts only on the neutrons and protons in the nucleus, holding them together
weak nuclear force
a powerful attractive force that acts over a short range
an attractive force that acts between any two masses
a center-directed force that continuously changes the direction of an object to make it move in a circle
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