Ap physics 1 forces

Force

Push or pull

Net force

Sum of all forces acting on an object

Is force a vector or scalar

Vector

Net force symbol

Fnet Ef

Fundamental forces

Force of gravity electromagnetic, strong weak

Force of gravity

Attractive force between masses

Electromagnetic force

Attraction or repulsive force between charges and a charge in a field

Strong force

Force that acts inside the nucleus

Weak nuclear force

Force that acts inside the nucleus and is responsible for some types of radioactivity

Newton's first law of motion

An object at rest or in motion will remain at rest or in uniform motion unless a net force acts upon it

Mass

Measure of the amount of inertia

Kg

Mass unit

Newton's second law of motion

The acceleration of an object is equal to the ratio of the net force to the mass

Fnet=ma or Ef=ma

Newton's second law of motion equation

Newton's third law of motion

For every action there is an equal ad opposite reaction

Drag force fd

Force exerted by a fluid that opposes the motion of an object relative to the fluid

Air Force fair

A drag force where fluid is air

Friction force ff or f

A force exerted by a surface of contact that points parallel to the surface and points opposite the relative motion of the two objects

Normal force fn or n

A force exerted on a surface of contact that points perpendicular to the surface

Spring force fs

A force exerted by a stretched or compressed spring

Applied force fa

A force exerted by an animate object

Tension force ft or t

A force exerted by a flexible object such as a cord, rope, string, or chain where the force acts parallel to the object

Buoyant force fb

A force exerted by an object by a fluid usually the force opposes the force of gravity

Weight

The force of gravity between a large mass, like a moon or planet and an object

Weight is the force of gravity

What is weight

Force of gravity

Force between masses

Fg or w

Symbol for the force of gravity

Fg=mg or w=mg

Force of gravity equation