Index Card #19

in additional to unequal wights the trebuchet uses mechanical leverage,the trebuchet and sling alone both use centrifugal force when a rock is placed in the puch of the sling or a rock is put into the sling of a trebuchet the motion and that you make with your arm or the trebuchet makes with its arm, holds the projectile in place until final release, than the power of the motion causes linear motion and kinetic energy and sends the projectile flying.