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Chap4_SecondLaw

# Chap4_SecondLaw - Chapter 4 Newton's Second Law of Motion...

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Chapter 4 Newton’s Second Law of Motion How does an object move when a force acts on it?

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Force & Acceleration Newton’s First Law of Motion, Zero Force Constant Velocity Definition of Acceleration, (Acceleration) = (Change in Velocity) (Time interval) (uniform motion)
Force Implies Acceleration From those two results we have that, Net Force not Zero Object Accelerates Velocity not Constant So if there’s a net force on an object, that implies that the object accelerates. Also have that if an object accelerates, that implies that there’s a net force.

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Acceleration Proportional to Force The greater the net force on an object, the greater the acceleration of that object. Double the Force Triple the Force Half the Force Double the Acceleration Triple the Acceleration Half the Acceleration Symbolically, we write: Acceleration ~ Force.
Check You push on a crate with 100 Newton of force. If the friction force is 100 Newton, does the crate accelerate? Does that mean that the crate is not moving?

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Check (cont.) Now push with 150 N; friction is still 100 N.
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