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Phys science chap 5

BJU 9th physical science terms chapter 5

a push or pull on a system force
The SI unit of force Newton
The force that holds protons and neutrons together in nuclei; the strongest of all fundamental forces Strong Nuclear Force
The attractive or repulsive force produced by static and moving charges in atoms electromagnetic force
the force exerted by all matter; the weakest of all fundamental forces gravitational force
a force that acts between systems only when one system touches another contact force
the mathematical description of a field force existing in the space surrounding an object that is the source of or is susceptible to the field force field
a noncontact force exerted on a susceptible object field force
a force that in combination with other forces acting on the same system produces a ZERO net force on the system balanced force
the sum of all forces acting on a system. If the forces are balanced this is zero. net force
a force that produces a change in motion because the sums of the forces is not zero unbalanced force
the tendency of all matter to resist change in motion inertia
Newton's first law of motion that states that objects at rest remain at rest and objects in motion continue in a straight line at a constant velocity unless acted upon by a net force Law of Inertia
Newton's second law stating that the acceleration of a system is directly proportional to the net force acting on the system and is iversely proportional to the system's mass. F=ma Law of Accelerated Motion
Law stating that for every action there is an equal and opposite reaction Action-Reaction Principle
a contact force that opposes motion friction
the force exerted by a supporting surface on an object resting on it. It is perpendicular to the supporting surface. normal force
a constant acceleration, such as that of an object in free fall uniform acceleration
the maximum constant speed of an object falling in the atmosphere. It occurs when drag balances the force of gravity. terminal velocity
a property of a moving object directly proportional to its mass and speed. momentum
p=mV linear momentum
Created by: D'Anne Cribb D'Anne Cribb on 2009-11-09

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