FORCE

FORCE

NET FORCE
1. BALANCED FORCES
  1. equal forces acting on an object
  2. no motion
2. UNBALANCED FORCES
  1. 1+ forces acting on object
  2. unequal amounts of force
  3. motion
3. combination of forces
  1. opposite directs = subtract
  2. same direction = add together
FRICTION
1. 2 objects rub against each other
2. depends on
  1. how hard surfaces push together
  2. types of surfaces
3. static friction
  1. on stationary objects
4. sliding friction
  1. 2 surfaces slide onto each other
5. rolling friction
  1. object rolls on a surface
6. fluid friction
  1. solid object move through a liquid
MEASURED
1. strength & direction
2. SI units
  1. newtons
GRAVITY
1. UNIVERSAL GRAVITY
  1. gravity is everywhere in the universe
2. MASS
  1. the more mass the greater the gravitational pull
  2. amount of matter in an object
  3. WEIGHT
    1. measure of the force of gravity on a mass
3. DISTANCE
  1. the more distance the less the gravitational pull
NEWTONS LAWS
1. 3. force = mass x acceleration
  1. acceleration = force / mass
2. 2. every action has an equal but opposite reaction
3. 1. an object in motion will stay in motion & an object @ rest will stay @ rest unless an outside force is exerted on it
  1. INERTIA
    1. the tendency of an object to resist a change in motion
MOMENTUM
1. velocity x mass
  1. kg x m/s
2. the more momentum the harder it is to stop
3. LAW OF CONSERVATION OF MOTION
  1. total momentum of a group of objects stays the same unless outside forces act on the objects
4. LAW OF CONSERVATION OF MOTION
  1. total momentum of a group of objects remains the same unless outside forces act on the objects

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