The drawing shows three identical springs hanging from the ceiling. nothing is attached to the first spring, whereas a 4.2-n block hangs from the second spring. a block of unknown weight hangs from the third spring. from the drawing, determine (a) the spring constant (in n/m) and (b) the weight of the block hanging from the third spring.

Mutt and jeff are running along a path each pushing a cart loaded with rocks. if mutt's wagon has a mass two times greater than jeff's and they want to stay together, arriving at their destination at the same time, what must happen? a) jeff should slow down so mutt can catch up. b) mutt must use half as much force to push his cart. c) mutt must use twice as much force to push his cart. d) mutt and jeff will use the same force, but mutt will take bigger steps.

If an athlete runs once around a track, back to the starting line, her average velocity is zero. true or false?

You throw a baseball directly upward at time =0 at an initial speed of 14.9 m/s. what is the maximum height the ball reaches above where it leaves your hand? ignore air resistance and take =9.80 m/s2.