Three people pull simultaneously on a stubborn donkey. Jack pulls directly ahead of the donkey with a force of 83.5 N , Jill pulls with 86.1 N in a direction 45° to the left, and Jane pulls in a direction 45° to the right with 175 N . (Since the donkey is involved with such uncoordinated people, who can blame it for being stubborn?) Find the magnitude of the net force the people exert on the donkey.

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.

Blank liquids and gases exert a buoyant force on objects placed in them

When the magnetic domains in a material can be aligned, but eventually drift out of alignment, the material is