Abstrakt
Physics concerning forces and their effects is one of the foundations of mechanics. It might seem that everything is very simple - it is enough to know Newton's laws of motion, which contain all the necessary information.
Unfortunately, it is not so easy. Our everyday experiences seem to tell us something different than the mentioned laws of movement.
It is therefore necessary to pay increased attention to forces and their effects during teaching. It is useful to have a stock of suitable experiments with which we can supplement the teaching.
Several such experiments are described and discussed in the paper. Two more experiments from acoustics are also included.