Principle


The students should measure the forces which maintain
equilibrium with different load masses on a step wheel.

They should measure the force and the length of the load arms
of a step wheel, and calculate the products
load × load arm and
force × force arm.


From their measuring results they should conclude that, under
static conditions, a step wheel works like a lever and that the
aforementioned products should be equal - as it is the case
for a lever.