18 terms

Equilibrium

In general, a state of balance where Fnet = 0

Force

Any influence that tends to accelerate an object. A push or a pull; measured in Newtons.

Friction

The force that acts to resist the relative motion (or attempted motion) of objects or materials that are in contact. A force that works against the motion of an object

Kilogram

The fundamental SI unit of Mass.

Mass

A measure of an object's inertia. Also, a measure of the amount of matter in an object. Depends only on the amount of and kind of particles that compose an object - not on its location.

Newton

SI Unit of Force.

Normal Force

For an object at rest, it is the upward force that balances the weight of the object at rest. Also called a Support Force

Support Force

For an object at rest, it is the upward force that balances the weight of the object at rest. Also called a Normal Force

Weight

The force on a body due to the gravitational attraction of another body (commonly the Earth). (***a downward force!***)

Volume

The quantity of space an object occupies

Newton's Second Law

The acceleration of an object is directly proportional to the net force acting on the object, it in the direction of the net force and is inversely proportional to the mass of the object. In other words... F=ma

Free Fall

Motion under the influence of gravitational pull only

Terminal Speed/Velocity

The speed at which the acceleration of a falling object terminates because air resistance balances its weight.

Acceleration

Change in velocity divided by the time it takes for the change to occur

Inverse Proportion

a relation between two quantities such that one increases in proportion as the other decreases.

Direct Proportion

A relationship between two quantities in which one increases as the other increases

Air Resistance

frictional force air exerts on a moving object; acts opposite in direction to the object's motion.

Depends on two things: speed and frontal surface area

Depends on two things: speed and frontal surface area

Net Force

The sum of all forces acting on an object. It is the net force that accelerates a mass (in the direction of the net force).