Consider two non zero vectors A and B which are at an angle of 45 degrees to each other. The magnitude of their vector sum is 20 units if a = 15 units, the determine b?

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?