1) the relationship between the lever length and force needed to lift the load is linear. It can essentially be represented by the equation M(l)L(l)=M(r)L(r). In words, the mass on the left multiplied by the length of the lever on the left should be equal to the mass on the right multiplied by the length of the lever on the right. 2) My catapult was neither precise nor accurate.
3) The difference between biomechanics and bio mimicry is that bio mimicry uses animalistic characteristics to make a certain tool or technology better. For example, scientists are trying to use a material similar to the shell of a mantis shrimp to make armor for combat troops because it is so strong.