CLEVER MACHINES - GRADE 9 MINI-PAT - Face to Face

Outcomes of Workshop

This workshop will enable you to:

• Experiment with two different sizes of syringes linked by a tube and filled with hydraulic fluid (water)
• Experience force transfer with either force multiplication or division
• Conduct action research
• Conduct investigations about the hydraulic press (including simple calculations) and the hydraulic jack
• Do practical investigations using a single wheel fixed pulley to change the direction of pull (MA = 0)
• Do practical investigations using a single wheel moveable pulley to change the direction of pull (MA > 0)
• Do practical investigations using a pulley block system (block and tackle) to determine the relationship between loadbearing ropes on moveable pulley wheels and mechanical advantage (multiplication)
• Find out about the following mechanical control systems: ratchet and pawl, disc brake, bicycle brake, cleat
• Successfully lead learners as they find out about the interactions of the following: o bevel gears of equal size – axis of rotation 90° o bevel gears of unequal size – axis of rotation 90° o velocity/force relationships o rack-and-pinion gear system as found on automatic gates and steering racks o worm gear system for large reduction in speed and increase in force
• Make a prototype/working model

Target Audience

DH technology, technology lead teachers, technology teachers, SES

Duration: Full day

SACE PD Points:

10