force & equilibrium
TRANSCRIPT
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Is LeBron James in equilibrium?
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Is the ball in equilibrium?
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The Pacman or Ricky Hatton?
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FORCE & EQUILIBRIUM
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Force
Commonly imagined as a push or pull on an object
Vector quantity May be a contact force or a
field force SI unit of newton (N)
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Pushing Force
Compressive force Creates compression
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Pulling Force
Tensile force Creates tension The tension is the same at all points in
the rope
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Contact Force
Results from physical contact between two objects
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Field Force
Acts between disconnected objects
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Characteristics of a Force
Magnitude Direction Point of Application
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Effects of Force
1. Changes the state of motion of a body
- accelerates the body
2. Deformation
- mass is the same but volume changes
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Equilibrium
Possessed by a body that is either at rest or moving in a constant velocity
The net force acting on the object is zero,
0F
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Static Equilibrium
The equilibrium possessed by bodies at rest.
The velocity of the body is zero.
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Dynamic Equilibrium
The equilibrium possessed by bodies in motion.
The velocity of the body does not change; its acceleration is zero.