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QuestionAnswer
force A push or a pull
magnitude the size of a quantity
net force The combination of all forces acting on an object
balanced forces forces acting on an object that combine and form a net force of zero
unbalanced forces forces acting on an object that combine and form a net force that is not zero
Laws of Motion Three laws formulated by Sir Isaac Newton that describe how objects move in relation to the forces acting on them.
Newton's First Law An object at rest stays at rest and an object in motion stays in motion with the same speed and in the same direction unless acted upon by an unbalanced force. (Law of inertia)
Inertia matter's resistance to change in motion
Momentum a measure of how difficult it is to change the inertia of an object.
law of conservation of momentum States that the total momentum of a group of objects stays the same unless outside forces act on the objects
Newton's Second Law The acceleration of an object is equal to the net force on an object divided by the mass of the object.
Newton's Third Law For every action force there is an equal and opposite reaction force
force always has: magnitude (size) and direction
Newton (N) unit used to measure force
1 kg x 1 m/s^2 1 Newton equals
mass x velocity momentum formula
p abbreviation for momentum
kilogram (kg) unit used for mass
meters per second squared (m/s^2) Unit used for acceleration
meters per second (m/s) unit used for speed
Kilograms x meters per second (kg x m/s) unit used for momentum
F = ma force formula
the object will slow down When the net force is in the opposite direction as the velocity what happens?
the object will speed up When the net force (and therefore acceleration) is in the same direction as the velocity what happens?
Created by: Ms. Greenup
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