Static Friction: a resistive force between stationary objects due to the roughness of the two surfaces in contact

Static Friction: a resistive force between stationary objects due to the roughness of the two surfaces in contact

Newton's third law: If two bodies exert forces on each other, these forces have the same magnitude but opposite directions 

Conservation of momentum: A law that states that the total momentum is conserved in a closed system 

Sliding Friction: A contact force that resists the sliding motion of two objects or an object and a surface.

Mass: The amount of matter in an object 

Centripetal force: Any force that causes centripetal acceleration 

Gravitational force: An attractive force that occurs between all objects that have mass

Weight: The force of gravity on an object

Friction: A force that opposes the motion of a body across a surface or through a gas or liquid 

Inertia: An object's resistance to a change in motion 

Fluid Friction: Occurs between fluid layers that are moving relative to each other

Newton's first law: A body remains at rest, or in motion at a constant speed in a straight line, unless acted upon by a force 

Strong nuclear force: The force that holds the nucleus of atoms together 

Force: A pull or push that is applied to an object 

Net force: The resulting force is determined by combining all of the forces acting on an object 

Terminal velocity: The maximum velocity (speed) attainable by an object as it falls through a fluid 

Projectile motion: A form of motion experienced by an object or particle (a projectile) that is projected near the Earth's surface and moves along a curved path under the action of gravity only 

Rolling friction: Engineering frictional resistance to rotation or energy losses in rolling bearings 

Gravity: A force that exists between any two objects that have mass and that pulls the objects together. The greater the mass of an object, the greater its gravitational pull. 

Weak nuclear force: The force responsible for radioactive decay 

Momentum: A quantity of how much inertia a dynamic object has 

Newton's second law: When a body is acted upon by a force, the time rate of change of its momentum equals the force

Electromagnetic force: Responsible for the chemical bonds between atoms which create molecules, and intermolecular forces 

Air resistance: A type of friction, or fluid resistance, another type of friction or fluid friction 

Newton: Newton built the first practical reflecting telescope and developed a sophisticated theory of color