Force & Equilibrium
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This document discusses forces and equilibrium. It defines force as a push or pull and notes that forces can be contact forces or field forces. It explains that static equilibrium occurs when the net force on an object is zero and it is at rest, while dynamic equilibrium is when the net force is zero and the object's velocity remains constant. Forces can change an object's motion by accelerating it or causing deformation by changing its volume.
Force & Equilibrium
- 1. Is LeBron James in equilibrium?
- 2. Is the ball in equilibrium?
- 3. The Pacman or Ricky Hatton?
- 5. 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)
- 6. Pushing Force Compressive force Creates compression
- 7. Pulling Force Tensile force Creates tension The tension is the same at all points in the rope
- 8. Contact Force Results from physical contact between two objects
- 9. Field Force Acts between disconnected objects
- 10. Characteristics of a Force Magnitude Direction Point of Application
- 11. Effects of Force 1. Changes the state of motion of a body - accelerates the body 2. Deformation - mass is the same but volume changes
- 12. 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, F 0
- 13. Static Equilibrium The equilibrium possessed by bodies at rest. The velocity of the body is zero.
- 14. Dynamic Equilibrium The equilibrium possessed by bodies in motion. The velocity of the body does not change; its acceleration is zero.