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Acceleration
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Gravity
Terms in this set (42)
acceleration definition
change in velocity over time
speed
distance over time
velocity
speed with a direction
deceleration
accelerating in the direction opposite to the motion of the object
acceleration equation
change in velocity divided by change in time
unit for acceleration
m/s/s
change in velocity
subtract starting speed from ending speed
change in time
subtract starting time from ending tme
unit for velocity
m/s W
unit for time
s
unit for speed
m/s
unit for distance
m
acceleration due to gravity on Earth
9.80 m/s 2
Air resitance
A force that opposes the motion of a body through air
friction
resistance (a force that acts in the opposite direction of motion.)
inertia
(physics) the tendency of an object to keep doing what it is doing. (the more mass an object has, the more inertia it has)
free fall
the motion of a falling object when the only force acting on it is gravity
newton second law
the acceleration of an object depends on the mass of the object and the amount of force applied
Newton's first law
an object at rest will stay at rest, an object that is moving will stay moving unless disturbed by an un balenced force.
Newton's third law
For every action there is an equal and opposite reaction
mass
A measure of the amount of matter in an object
The Newton
The force that causes a mass of 1kg to accelerate at 1ms^-2
Net force
the combination of all forces acting on an object
weight
A measure of the force of gravity on an object
Terminal velocity
the speed at which the acceleration of a falling object is zero because friction balances the weight 43
slope
Rise over run
a force that occurs with every action force is called an
reaction force
resistance to change in motion is
Inertia
kilograms
unit for mass
independent variable
the variable that you are investigating (the variable that causes the change in an investigation ) . On a graph this variable goes on the Y axis.
dependent variable
the variable that changes as a result of the independent variable. On a graph this variable goes on the X axis.
experimental variable
same as the independent variable
control variables
variables in an investigation that remain unchanged.
energy
causes change in a system
potential energy
Energy that is waiting to do work.
kinetic energy
energy in motion
law of conservation of energy
energy can not be created or destroyed.
law of conservation of momentum
total momentum before a collision = total momentum after the collision.
1st law of motion
an object at rest stays at rest and an object in motion stays in motion unless acted on by an unbalanced force
2nd law of motion
explains why it takes more force to move a truck that it is to move a bike at the same speed
3rd law of motion
for every action there is an equal and opposite reaction
force
a push or a pull
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