key terms. Flashcards
(25 cards)
acceleration
any change in velocity
air resistance
a force that resists an objects motion through air
applied force
a type of force exerted by a person, animal or machine.
balanced force
a force with equal and opposite forces acting on the same object
collision force
a contact force that acts on an object when it hits another object
contact force
any force that can only occur when two objects are touching
force
a push or pull
free body diagram
a representation of all the forces acting on an object
friction
a force that resists an objectβs motion
gravity
an attractive force between two objects that have mass
inertia
natural tendency of an object to maintain a constant velocity.
mass
the amount of matter in an object
net force
the overall force on an object
non-contact force
any force that can occur when two objects are not touching.
examples of non-contact forces
gravity, magnetism, electrostatic forces
speed
rate of change of an objectβs position
support force
an upward force exerted on an object by a solid surface
tension
a force that pulls inward when a solid object is stretched
thrust
a force that acts on an object when its shoots out a jet of liquid or gas
examples of thrust
moves rockets and jetskis, propulsion
what does a support force do
balances gravity, prevents objects from falling.
unbalanced force
a force without an equal and opposite force acting on the same object.
velocity
the speed of an object in a certain direction
water resistance
a force that resists an objectβs motion through water
