Physics

• What is the unit for force

  Newtons
• What is the unit for energy


  Joules
• Unit for pressure


  Pascals
• Specific heat capacity unit

  Joules/kilogram degree celcius
• Formula for volume of sphere

  4/3πr^3
• What can will irregular objects be placed in for measuring volume of irregular objects

  Eureka can
• What is called when particles in a fluid move with random motion

  Brownian motion
• What temperature in C is absolute zero

  -273ºC
• What happens to particles at absolute zero

  Particles no longer move and exert pressure
• What happens to pressure when a gas' volume is decreased

  Pressure increases
• How are pressure and volume of gas linked

  Inversely proportional
• why does pressure increase as volume decreases

  If the volume of a container is decreased, the gas molecules have less space in which to move around. As a result, they will strike the walls of the container more often, and the pressure increases
• When is P1/T1=P2/T2 used


  When volume is constant
• When is P1V1=P2V2


  When temperature is constant
• What does a flat line in distance-time graphs show

  Stationary
• What does the gradient in distance time graph show

  Speed
• What does area under velocity time graph show

  Distance moved
• What does fradient for velocity time graph show

  Acceleration
• What does a flat line in velocity time graph show

  Constant velocity
• What are the 9 types of forces


  Upthrust

  Lift

  Thrust

  Weight

  Friction

  Air/water resistance

  Magnetic

  Electrostatic

  Reaction
• Is force scalar or vector

  Vector
• What is resultant force

  The overall force on an object
• Stopping distance equation


  Thinking distance+braking distance
• What 2 factors affect air resistance

  1. Surface area of person
  2. Velocity falling
• Spring constant equation


  Spring constant = force x extension
• What does spring constant show

  How many Newtons it would take for an object to be stretched by 1m
• Hooke's law


  Extension is proportional to force applied
• What happens at limit of proportionality

  Hooke's law cannot be applied as the object will not go back to og shape and it will undergo plastic deformation
• Velocity equation


  displacement/time
• What is Newton's first law

  A resultant force is required to change the motion of an object
• Moving objects with no resultant force will continue to move at the same velocity
• What is Newton's 2nd law


  A resultant force will cause an object to accelerate in the direction of the force.
• What is weight measured in

  Newtons
• Formula for gravitational potential energy


  mass x gravitational field x height
• What r the 4 energy transfers

  Mechanical, electrical, heating by particles, heating by radiation
• Which way to field lines go in magnets

  North to South
• Which pole do compasses point to

  South
• What angle for wire to feel full force in magnets

  90ºC
• What is motor effect


  A current carrying wire in the presence of a magnetic field will experience a force.