I have been wanting for some time to analyse this camp site can crushed but was missing one vital piece of information - the force of my arm pushing down. So I used the Newtonscales and got 150N.
From the photographs, I put 150N 30cm from the pivot. The centre of the can is maybe 3cm from the pivot. Crushing force x 3 = 150 x 30 by Principle of Moments so crushing force = 1500N. It has multiplied my arm force by 10 so this type of lever is called a force multiplier.
