You use a pulley system to lift a fallen tree . you apply a force of 50 n and the pulley pulls on the tree with a force of 1300 n what is the mechanical advantage of the pulley ?

22. the top of a cliff is located a distance h above the ground. at a distance h/2 there is a branch that juts out from the side of the cliff, and on this branch a bird's nest is located. two children throw stones at the nest with the same initial speed, one stone straight downward from the top of the cliff and the other stone straight upward from the ground. in the absence of air resistance, which stone hits the nest in the least amount of time?