Please enable JavaScript.

Coggle requires JavaScript to display documents.

physics paper two (Forces (forces and elasticity, resultant forces and…

- - - - number of forces acting act a single point can be replaced with a single forces - called resultant force
      - foce acting upon the same line has an overall effect found by adding those going in the same direction and subtracting any going the operate way
      - in real situation there at least two forces acting on an object along any direction
    - - size of the arrow show the relative magnitudes of the force and the direction show the direction the forces acting on the objects
      - show this information in free body diagrams
      - describe the force acting on an object e.g. skydiver weight pull him down where as the drag act in the opposite direction
    - - to make something move force is applied which needs energy aka work done is the energy transferred they are he same thing
      - push something along a hard surface your doing work against friction also the kinetic energy store due to friction because overall temperature increases
      - when force move an object through a distance energy is transferred and work id done on an object
      - work done = force X ditance
  - - - weight of an object depends on the gravitational field at the location - weight changes in different locations e.g. earth or moon
      - a force measured in newtons using spring balance so it act at the centre of mass
      - the force attaching on an object due to it gravity - course the gravitational field around the earth
      - weight = mass (kg) X gravitational field strength
    - - the closer you are to the mas the stronger the gravitational filed strength
      - not a force measured in kilograms with mass balance
      - amount of stuff in an objects and has the same value anywhere
      - increasing the mass increase the weight of an object they are direct proportionality
    - - attracts all mass
      - only noticed on something really big like the gravitational force attached to a plant
      - on the surface of the plant it make all thing more towards the ground
      - gravity make everything have a weight
  - - - contact force - friction , air resistance , tension in popes and normal contact force
      - two intecting objects there is force produced in both objects
      - non-contact force - magnetic force , gravitational force and electrostatic force
      - sun and erath are attracted to each other by a non-contact force . force felt by both the sun and the earth
      - a chair exacts force from the ground whilst the ground pushes back the chair with the same force , equal force so felt by both chair and ground
    - - vectors have a magnitude and a direction
      - physical quantities are force , velocity , displacement , acceleration and momentum
      - represented by an arrow - the length show magnitude and direction show the direction of the quantity
    - - expels are speed , distance , mass ,temperature and time
      - no direction and only have magnitued