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Review2_3_2009

# Review2_3_2009 - Review 2 Using Newton's 1st Law Particles...

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Review 2

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Using Newton’s 1st Law :  Particles in Equilibrium Particle in equilibrium 0 F = r 0 x F = 0 y F =
Using Newton’s 2nd Law:     Dynamics of Particles Dynamics : the relationship of motion to the forces that cause it F ma = r r x x F ma = y y F ma = : Newton’s 2nd Law, vector form : Newton’s 2nd Law, component form

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Frictional Forces Friction: the force that opposes the relative motion or tendency of such motion of two surfaces in contact It is directed opposite to the motion of an object. Static friction : the friction acting on a body when the body is not in motion, but when a force is acting on it. Static friction is the same as the force being applied (because the body isn't moving). Limiting friction : the friction on a body just before it starts moving. Generally, limiting friction is highest. Kinetic friction : the friction which acts on the body when the body is moving. Kinetic friction is usually smaller than limiting friction.
Kinetic force

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Review2_3_2009 - Review 2 Using Newton's 1st Law Particles...

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