Active learning ideas
Friction and Resistance introduces students to the force that opposes motion. Students explore how different surfaces, from smooth ice to rough sandpaper, affect how objects move. In the NCCA curriculum, this falls under the 'Energy and Forces' strand, focusing on how forces can be used to start, stop, or slow down movement.
Activity 01
Groups use a ramp and a toy car. They cover the ramp in different materials (tinfoil, carpet, bubble wrap, sandpaper) and measure how far the car travels on each, discussing which surface created the most friction.
What is friction?
Activity 02
Students try to rub two pieces of sandpaper together. Then, they imagine adding soap or oil between them. They discuss in pairs how the 'lubricant' changes the friction and why this is useful for a bicycle chain.
Which surfaces create the most friction?
Activity 03
Display photos of various sports equipment (rugby boots with studs, ballet shoes, Formula 1 tires, curling stones). Students move in groups to explain whether each sport wants *more* or *less* friction and why.
How do lubricants work?
A few notes on teaching this unit
Watch Out for These Misconceptions
Friction only happens with moving objects.
Students often think friction only 'starts' when something moves. Discussing why it's hard to *start* pushing a heavy box on a carpet helps them understand 'static friction', the force that keeps things still. This is best explored through a tug-of-war style demo.
Friction is always a 'bad' thing.
Students often associate friction with slowing down or wearing out. A 'Structured Debate' about a 'World Without Friction' (where we couldn't walk, grip a pen, or stop a car) helps them realize that friction is essential for almost every action we take.
Methods used in this brief
Gravity and Weight
Learners examine the pull of gravity on objects and how it relates to weight. They use force meters to measure the gravitational pull on various items.
8 methodologies
Levers and Pulleys
Students investigate how simple machines like levers and pulleys make work easier. They design and build their own simple lifting mechanisms.
8 methodologies