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physics midterm review
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Gravity
Terms in this set (54)
braking
the time/distance it takes between a reaction and stopping
scalar
a quantity with only a magnitude
speed
how fast distance changes over time
time
how long something takes
resultant
the sum of two or more vectors
m/s
unit for speed/velocity
acceleration
how fast velocity changes over time
vector
a quantity with magniture and direction
m/s2
unit for acceleration
seconds
the unit for time
distance traveled
the area under a velocity vs. time graph
velocities
slopes of distance vs. time graphs
displacement
how far something has moved and in what direction
velocity
how fast distance changes over time and in what direction
distance
how far something has moved
motion
any physical movement or change in position
response
the time/distance it takes between a stimulus and a reaction
meters
unit for distance and displacement
accelerations
slope of velocity vs. time graphs
weight
force due to gravity
friction
force opposing an objects motion
newtons second law
the acceleration of an object is directly proportional to the net force o it and inversely proportional to the objects mass
newtons third law
whenever one object exerts a force on another, the 2nd object exerts an equal and opposite force back
tension
force on strings
kgm/s
unit for momentum
Ns
unit for impulse
drag
force caused by air resistance
vector
quantity with magnitude and direction
free body diagram
a diagram of all the forces that act on an object at a certain time
conservation law
momentum before= momentum after
impulse
the quantity force x time and changes momentum
center of mass
acts as the location of all a body's mass
momentum
a measure of motion determined by mass and velocity
intertia
the tendency of an object to resist a change in motion
newton
unit for force
normal
force perpendicular to surfaces
force
a push or pill
newtons first law
an object at rest stays at rest and an object in motion stays in motion unless acted on by a net, unbalanced force
scalar
quantity with only a magnitude
kg
unit for mass
radius
this value is important to determining the speed of an object
velocity
this value is constantly changing direction in circular motion
orbital
the force that keeps satellites in orbit around planets and stars
coefficient of friction
this number is a measure of the strength of the friction force
distance
the orbital speed of a satellite depends on the mass of the planet and the ______
mass
the max turning speed does not depend on this value
inversely
the period and the frequency are ____ proportional
directly
centripetal acceleration and speed are ___ proportional
normal force
the frictional force depends on the ___
friction
the force that keeps a car turning around an unbanked corner
frequency
how many times the object completes a revolution per unit time
circumference
the distance traveled in one revolution is called the ____
center
the centripetal force always points towards the ___
period
the time it takes to complete one revolution
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