24 terms

force and motion vocab

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force
a force is a push or pull on an object
balanced forces
equal forces acting on an object in opposite directions causing no change in movment
unbalanced forces
unequal forces acting on an object in opposite directions causing changeing its movment
gravity
a non-contact force that exist between all objects
weight
amount of gravity effecting a object
mass
amount of matter in a object
friction
a force that slows down or prevents motion between two objects
motion
a change in position in a certain amount of time
constant speed
speed that does not change
velocity
the speed of a object in a particular direction
average speed
speed that varies (most of the time an objects speed is not constant) (s=d/t)
acceleration
the rate at which an object changes speed and/or direction (a=vf-vi/t)
deceleration
negative acceleration
momentum
mass * velocity (p=mxv) it increase the speed or velocity increses
centripetal
a force that keeps a object moving in a circular path: it acts "toward the center" of the circle
inertia
newtons first law a property of matter that tends to resits any change in motion
net force
the net force is all of the forces combined
kinetic force
energy in motion
potential energy
stored energy
contact force
a forces that evolves two objects that touch each other exp. friction, elastic, buoyancy
noncontact force
a forces that evolves two objects that do not touch each other exp. magnetism, static electricity, magnitism
newtons first law
inertia objects at rest want to stay at rest unless acted on by a force and objects in motion want to stay in motion unless acted on by a force
newtons second law
(F=ma) force is affected by mass and acceleration
newtons third law
for every action, there is an equal an opposite reaction
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