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8th Unit 4 set B

Force and Motion Key Terms

Newton’s First Law of Motion an object at rest will remain at rest; an object in motion will remain in motion, unless acted upon by an outside force.
Newton’s Second Law of Motion the mass of an object is inversely proportional to the acceleration. F=ma
Newton’s Third Law of Motion for every action there is an equal and opposite reaction.
Friction the rubbing of the surface of one body against that of another.
Kinetic friction the opposing force acting upon an object.
Rolling friction friction produced when one object is rolled over another.
Sliding friction friction produced when one object slides over another.
Static friction the force opposing the movement of an object.
Coefficient of friction frictional forces between two objects.
Compound Machine two or more simple machines working together for a common function.
Balanced forces when the sum of the forces acting on an object are equal the object will remain at rest, or it will move at a constant velocity.
Free body diagram a figure used to visualize the forces acting on an object in a given condition.
Unbalanced forces when the sum of the forces acting on an object are not equal, the object will accelerate or decelerate.
Created by: darrin_evans