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ch 5 last half notes

# ch 5 last half notes - 5.4 What Do Forces Do A Virtual...

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5.4 What Do Forces Do? A Virtual Experiment -two identical rubber bands, each stretched to the standard length, exert twice the pull of one rubber band: F(net)=2F -so F(net)=NF -an object pulled with a constant force moves with a constant acceleration -the object accelerates with a constant acceleration for as long as you pull it with a constant force -doubling the force casues twice the acceleration, triplin the force causes three times the acceleartion, and so on. -the acceleration is directly proportional to the force -a=cF c is called the proportionality constant and is the slope of the graph -an object twice the size of the original has only half the acceleration of the orignial object when both are subjected to the same force -an object's mass is a measure of the ammount of matter it contains -the tendency of an object to resist a change in its velocity (i.e. to resist acceleration) is called inertia -inertial mass "m" of an object is to be m = 1/(slope of the acceleration-versus-force graph) = F/a (the first equal sign should have three bars (is defined as)) -this equation is another operational definition We usually refer to the inertial mass as simply "the mass."

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ch 5 last half notes - 5.4 What Do Forces Do A Virtual...

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