22 terms

Conceptual physics, ch 5 Newton's Third Law of Motion

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Newton's Third Law
For every action there is an equal and opposite reaction
vector quantity
magnitude and direction
force, velocity and acceleration
vector quantities
scalar quantity
a quantity that can be described by magnitude only and has no directionv
vector
an arrow drawn to scale used to represent a vector quantity
resultant
the sum of two or more vectors
component
mutually perpendicular vectors as in those illustrated by a stone's throw
resolution
process of determining the components of a vector
Newton's first law
an object at rest tends to remain at rest;an object in motion tends to remain in motion at constant speed along a straight line path
Newton's second law
The acceleration of an object as produced by a net force is directly proportional to the magnitude of the net force, in the same direction as the net force, and inversely proportional to the mass of the object.
law of acceleration
Newton's second law
net force when objects fall in a vacuum
net force is weight, pull of gravity, no air resistance
Terminal Speed/Velocity
The speed at which the acceleration of a falling object terminates because air resistance balances its weight.
acceleration of a car is caused by what force
the road pushes back on the motion of the tires
the law of action-reaction
Newton's third law
inertia
mass is the measure of ___________________
speed
measures how fast an object is going
velocity
measure speed and direction of an object
helicopter hovers
when lift equals weight of helicopter
when lift is greater
the heliocopter moves upward
downward
birds fly by pushing air downward
yes
when a bug and car collide do both experience the same force