SACs and Pracs with Paul 1 & Paul 2 SACs, Apps, Pracs and demos Paul Fielding Billanook College Paul Fitz-Gerald Ivanhoe Girls’ Grammar School
What we would like to cover iApps used in class Practical experiments/demonstrations with potential to become investigation tasks/SACs Other practical experiments/demos that we find work well The experiments we selected to cover today have been proven in our classes, low cost and effective.
Motion App: Sparkvue (free) Accelerometer and ‘g’ meter. Images: in a lift, circular motion Footage: apparent weight
Waves (sound/light)
Motion App: Videophysics ($4.99) Show graphs from app.
Sound
Motion Keyring camera ($8 Hobbyking.com) Not an app/SAC but could add interest Show footage
Sound
Singing rods with frequency counter Frequency Meter PRO ($1.24) fλ=v 4185x0.608x2=5088 m/s (5082 m/s speed in aluminium rod)
Investigations 1.The Simple PendulumThe Task Investigate what factors will affect the period, T, of a simple pendulum. Independent Variables: pendulum length mass of bob angle of release
Investigations 2.A Circular Motion Toy The Task Investigate what factors will affect the period of rotation, T, of a circular motion toy. Independent Variables: length of string mass of toy 3.The Coefficient Of Restitution Of A Super Ball The Task Investigate what factors will affect the coefficient of restitution, e, of a super ball. Independent Variables: release height temperature of ball rebound surface
Investigations 4.The Coefficient Of Restitution Of A Basketball The Task Investigate what factors will affect the coefficient of restitution, e, of a basketball. Independent Variables: release height ball pressure rebound surface 5.The Coefficient Of Restitution Of A Table Tennis Ball The Task Investigate what factors will affect the coefficient of restitution, e, of a table tennis ball. Independent Variables: release height rebound surface
Investigations 6.The Thrust Generated By A Propeller The Task Investigate what factors will affect the thrust force, F, of propeller. Independent Variables: number of blades blade pitch angle area of blades 7.The Coefficient Of Static Friction The Task Investigate what factors will affect the coefficient of static friction,. Independent Variables: surface type area of contact between surfaces mass of object
Investigations 8.The Fall Time Of A Parachute The Task Investigate what factors will affect the fall time of a parachute, t. Independent Variables: area of parachute mass supported hole size (in top of parachute0 shape of parachute
Light Endoscope Polariser with sticky tape
Traditional light demos
Motion App: Coasterphysics ($0.99)