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21 terms

Chapter 4,5,6 vocab

The vocab for Newton's first three laws for the test next week.
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Newton's First Law
All objects continue in a state of rest or of motion in a straight line at a constant speed, unless it changes due to forces exerted upon it.
law of inertia
newtons first law
kilograms
mass is measured in...
mass
the quantity of matter in an object
weight
the force due to gravity on an object
newtons
forces are measured in ...
net force
the combination of all forces acting on an object
normal force
a force that counteracts the weight
equilibrium
occurs when the net force is zero
force
a push or a pull
friction
the force that acts between materials that touch as they move past each other
inertia
the property of a body t resist change
inversely
two values change in opposite directions
Newton's second law
a=f/m
air resistance
the friction acting on something moving through air
free body diagram
a diagram showing all the forces acting on an object
terminal speed
when acceleration terminates; air resistance = weight
interaction
a force is part of an ...
Newton's third law
when one object exerts a force on a second object, the second object exert an equal and opposite force on the first object
action force
1st force in an interaction
reaction force
2nd force in an interaction