- Lived from 1642 - 1727
- Discovered the binomial theorem at 18 years old.
- Discovered the law of universal gravitation.
- Stated the 3 laws of motion by 1665.
- Dynamics - The study of the effects of forces on matter.
- All changes in motion are the result of forces.
- Forces are what cause any objects to interact.
- The symbol for force is NEWTON (N)
- One Newton is equal to 1.0 kg x 1.0 m/s²
KINDS OF FORCES
GRAVITAIONAL FORCE - a force of attraction that exists between all masses.
ELECTROMAGNETIC FORCE - the forces between charged particles.
STRONG NUCLEAR FORCE - holds the nucleus of an atom together.
WEAK NUCLEAR FORCE - a form of electromagnetic force that acts within the nucleus that is involved in breaking down nuclei.
MASS AND WEIGHT
- Mass is the amount of matter in an object.
- Weight is the gravitational force exerted on an object.
- Weight is found using: W = mg
- W = Weight m = Mass g = acceleration of gravity (9.8 m/s²)
- Weight depends on location while mass does not.
- Friction is a force that opposes the motion of an object.
- STATIC FRICTION - resists the start of motion.
- SLIDING FRICTION - resists existing motion
- Static friction is always larger than sliding friction.
- To find friction, you use the equation: Ff = μFn
- Ff = Friction μ = coefficient of friction Fn = Normal Force
- Normal Force (Fn) of an object is numerically equal to that object's Weight (W)
- The vector sum of all forces acting on an object.
- To find Net Force, use the equation: Fn = Fa + Ff or Fn = Fa - W
- Fn = Net Force Fa = Applied Force Ff = Friction W = weight
- Isaac Newton
- Newton's First Law - An object in motion stays in motion; an object at rest stays at rest.
- Newton's Second Law - An unbalanced force causes acceleration.
- Newton's Third Law - Every action has an equal and opposite reaction.
- 4 kinds of forces
- Difference between Mass and Weight
- Sliding Friction and Static Friction
- Net Force