Physics 2

• state the 'work' equation

  work done= force x distance
• state the 'work' symbol exuation

  w=f x d
• what unit is the work done in

  joules
• what unit is distance in

  meters
• what unit is force in

  newtons
• what is 'work done.'

  energy transferred
• state the 4 non renewable energy resorces: coal, oil , natural gas, nuclear fuels
• state 3 facts about non renewale energy: all run out, damage enviroment by provide energy to most things
• what is in a power station

  fuel-boiler-turbine-generator-grid
• what 4 energy transfers happen in a generator

  chemical-heat-kinetic-electrical
• equation for acceleration speed and time

  a=v-u/t
• equation for weight mass and grams

  m=w/g
• equation for stopping distance

  thinking distance + braking distance
• equation for force mass accesleraiotn

  m=f/a
• equation for initial speed2: initial speed2 = 2x acceleration x distance
• euqation for moment force distance

  f=m/d
• equation for force spring constant extension

  k=f/d
• what are the units for acceleration

  m/s2
• equation for average orbital speed

  v=2pieR/t
• state two ways the orbit of earth and mars are similar: same shape. both orbit the sun
• state one way in which the orbit on earth and mars differ: different orbital speed
• what is the unit for gravitational field strength


  kg/n2
• define a force: a strength or energy as an attribute of physical action
• if forces are balanced then at rest and moving...: rest= stay. moving= stays at an constant speed
• example of tension


  rope or cable
• equation for newtons law

  f=mXa
• what does drag, air resistance and friction cause: something to slow down
• define electrostatic force


  opposite charges
• where does the arrow for reaction force go: straight upwards
• where does the arrow for gravity or wright go: down
• what does thrust cause

  speed up -
• where are the four forces on car: thrust. reaction. drag. weight
• equation for tension


  a= ef/m
• what forces act on the skydiver kist after jumped out of plane: air resistance
• what does air resistance cause terminal velocity: force slows it down as it is larger than wieght force making it unbalanced
• what happenes to the air resistance as the skydiver accelerates: air resistance is less and the sky diver speeds up
• what happens to airresistance when parrachute is opened: larger than weight. puller upwards and slows down
• what force always acts opposite to motion


  friction
• what is the equation for motion, conservation of energy: v2=u2+2as
• define hookes law: the extension of a spring is directly proportional to the force applied