16 terms

Mass

The quantity of matter in an object. More specifically, it is the measure of the inertia or sluggishness that an object exhibits in response to any effort made to start it, stop it, deflect it, or change in any way its state of motion.

Inertia

The property of things to resist changes in motion.

Newton's first law of motion (the law of inertia)

Every object continues in a state of rest or uniform speed in a straight line unless acted on by a nonzero force.

Force

In the simplest sense, a push or a pull.

Newton's Second Law

The acceleration of an object is directly proportional to the net force acting on the object, is in the direction of the net force, and is inversely proportional to the mass of the object.

Newton's third law

Whenever one object exerts a force on a second object, the second object exerts an equal and opposite force on the first.

Friction

The resistive force that opposes the motion or attempted motion of an object either past another object with which it is in contact or through a fluid.

Net force

The vector sum of forces that act on an object.

Vector

An arrow drawn to scale used to represent a vector quantity.

Resultant

The net result of a combination of two or more vectors.

Mechanical equilibrium

The state of an object or system of objects for which there are no changes in motion. In accord with Newton's first law, if an object is at rest, the state of rest persists. If an object is moving, its motion continues without change.

Equilibrium Rule

For any object or system of objects in equilibrium, the sum of forces acting equals zero.

Instantaneous Speed

The speed at any instant.

Average Speed

The total distance traveled divided by the time of travel.

Weight

The force upon an object due to gravity, mg.

Volume

The quantity of space on object occupies.