Physics Unit 2 - Newton's 2nd Law (p)
acceleration ~ net force
An object's acceleration is directly proportional to the net force acting on it.
Force
Any influence that can cause an object to be accelerated, measured in newtons (or in pounds, in the British system).
fluid
Anything that flows; in particular, any liquid or gas.
sliding friction
Contact force produced by the rubbing together of the surface of a moving object with the material over which it slides.
Acceleration ~ 1/ mass
For a given force, the acceleration produced is inversely proportional to the mass.
static friction
Force between two objects at relative rest by virtue of contact that tends to oppose sliding.
air resistance (a.k.a. air drag)
Friction, or drag, that acts on something moving through air.
Free Fall
Motion under the influence of gravitational pull only.
Terminal velocity
Terminal speed together with the direction of motion (down falling objects).
Newton
The SI unit of force. One newton (symbol N) is the force that will give an object of mass 1 kg an acceleration of 1m/s².
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.
Weight
The force due to gravity on an object.
Kilogram
The fundamental SI unit of mass. One kilogram (symbol kg) is the mass of 1 liter (1 L) of water at 4° C.
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.
Volume
The quantity of space an object occupies.
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.
Terminal speed
The speed at which the acceleration of a falling object terminates because air resistance balances its weight. When direction is specified, then we speak of *terminal velocity*.
Inversely
The two values change in opposite directions. (As the denominator increases, the whole quantity decreases. For example, the quantity 1/100 is less than 1/10.
