Mrs. Howthorne 4th period Force vocabulary

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force
a push or pull
pound
the English unit of force equal to 4.448 newtons
newton
the metric unit of force equal to the force needed to make a 1kg object accelerate at 1m/s
tension
a pulling force that acts in a rope, string, or other object
extension
a stretch or increase in size
compression
a squeeze or decrease in size
friction
a force that resists motion
sliding friction
the friction force that resists the motion of an object moving across a surface
static friction
the friction force that resists the motion between two surfaces that are not moving
net force
the sum of all forces acting on an object
balanced force
combined forces that result in a zero net force on an object
normal force
the perpendicular force that a surface exerts on an object that is pressing on it
free-body diagram
a diagram showing all the forces acting on an object
equilibrium
the state in which the net force on an object is zero
weight
a measure of the pulling force of gravity
Newton's first law of motion
a law of motion that states that an object at rest will stay at rest and an object in motion will stay in motion with the same velocity unless acted on by an unbalanced force
Newton's second law of motion
a law of motion that states that acceleration is force divided by mass
Newton's third law of motion
a law of motion that states that for every action force, there is a reaction force equal in strength and opposite in direction
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