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Level 29

Forces & Motion


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motion
An object is moving if its position relative to a fixed point is changing.
inertia
_______ is the property of an object that leads it to resist any change in motion
balanced force
Equal forces acting on an object in opposite directions
mass
a body of coherent matter, usually of indefinite shape and often of considerable size
force
(interactions between two objects)
unbalanced force
force acting on an object that causes a change
Velocity
a speed in a particular direction.
net force
Acceleration depends on the
acceleration
(physics) a rate of change of velocity
gravity
(physics) the force of attraction between all masses in the universe
weight
A force that comes from gravity pulling down on any object with mass
Law of Inertia; Newton's First Law
an object at rest stays at rest AND an object in motion stays in motion unless acted on by an outside force
Newton's second law
Acceleration is produced when a force acts on a mass, the greater the mass, the more force is required to accelerate the object.
Newton's Third Law
All forces come in pairs. The two forces in a pair act on different objects and are equal in strength and opposite in direction.