Arock is rolling down a hill. at position 1, its velocity is 2.0 m/s. twelve seconds later, as it passes position 2, its velocity is 44.0 m/s. what is the acceleration of the rock? 42.0 m/s
2 3.7 m/s2
3.8 m/s2
3.5 m/s2

Determine el momento angular de un rueda de 3000g moviendose a 10m/s con un radio de giro de 400cm

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.

Arocket starts from rest and moves upward from the surface of the earth. for the first 10.0 s of its motion, the vertical acceleration of the rocket is given by ay = 12.80 m/s32t, where the +y-direction is upward. (a) what is the height of the rocket above the surface of the earth at t = 10.0 s? b) what is the speed of the rocket when it is 325 m above the surface of the earth?