Simple machines – Levers
Make class 1 and class 2 levers and understand how they help ease our efforts.
Compare the working of a forcep (class 3 lever) with that of the other 2 to understand the difference in position of load, effort and fulcrum.
Inclined plane, wedge
Make an inclined plane to lift objects. Observe the reduction in effort when the angles are changed however there is a trade off – can you spot it?
Make a wedge and how it reduces effort. Understand that relation between wedge and inclined plane.