Studied by 4 people
inertia
the sluggishness or apparent resistance an object offers to change in its state of motion
speed
distance traveled per time
velocity
the speed of an object and specification of its direction of motion.
acceleration
rate at which velocity changes with time; the change in velocity may be in magnitude or direction or both
free fall
state of fall free from air resistance and other forces except for gravity.
mass
the quantity of matter in an object
weight
the gravitational force exerted on an object by the nearest most-massive body.
kilogram
the fundamental SI unit of mass. One kilogram is the amount of mass in 1 liter of water
newton
the SI unit of force. One Newton is the force that will give an object of mass 1 kg an acceleration of 1 m/s squared
volume
the quantity of space an object occupies
force
any influence that can cause an object to be accelerated, measured in Newtons
mechanical equilibrium
the state of an object or system of objects for which any impressed forces cancel to zero and no acceleration occurs.
static equilibrium
an object that is not moving and has 0 acceleration.
dynamic equilibrium
an object that is moving, without accelerating.
friction
the resistive forces that arise to oppose the motion or attempted motion of an object past another with which is in contact
terminal speed
the speed at which the acceleration of a falling object terminates because friction balances the weight
momentum
the product of the mass of an object and its velocity.
impulse
the product of the forces acting on an object and the time during which it acts.
relationship of impulse and momentum
impulse is equal to the change in the momentum of the object that the impulse acts on.
conservation of momentum
when no external net force acts on an object or system of objects, no change of momentum takes place
interaction
mutual action between objects in which each one exerts an equal and opposite force on the other
force pair
The action and reaction pair of forces that constitute an interaction.
force vector
an arrow drawn to scale so that its length represents the magnitude of a force and its direction of the force
velocity vector
an arrow drawn to scale so that its length represents the magnitude of the velocity and its direction represents the direction of motion
resultant
the net force of a combination of two or more vectors.
vector components
parts into which a vector can be separated and that act indifferent directions from the vector
net force
the combination of all forces that act on an object.
vector quantity
A quantity that specifies direction and magnitude.
support force
the force that supports an object against gravity, sometimes called normal force
friction
The resistive force that opposes the motion or attempted motion of an object through a fluid or past another object with which it is in contact.
air resistance
The force of friction acting on an object due to its motion through air.
hang time
The time that one's feet are off the ground during a vertical jump.
the law of universal gravitation
every mass in the universe attracts every other mass with a force that for two masses is directly proportional to the product of their masses and inversely proportional to the square of the distance separation them.
inverse square law
a law relating the intensity of an effect to the inverse square of the distance from the cause.
weightlessness
a condition encountered in free-fall wherein a support force in lacking.
efficiency
the percent of the work put into a machine that is converted into useful work output.
energy
the property of a system that enables it to do work. the ability to do work.
power
the time rate of work p=(work/time)
conservation of energy machines
the work output of any machine cannot exceed the work input.
kinetic energy
energy of motion
conservation of energy
energy cannot be created or destroyed
work
the product of the force and the distance through which the force moves w=fd
potential energy
the stored energy that a body possess because of its position.
Note 
Flashcard (44)