Centre of mass. The lever
Answers are for parents and teachers.
1
F₁ = 30 N, l₁ = 4 m, l₂ = 8 m. F₂ for equilibrium in N?
15
2
Force 80 N, arm 3 m. Moment in N·m?
240
3
Find three household objects that work on the lever principle and write them.
Sample: scissors, spanner, door handle.
4
Find and mark the centre of mass of a cardboard shape using a thread.
The intersection of two or three hanging lines.
5
Why is it easier to push a door far from the hinges?
With a longer arm a smaller force gives the same moment.