2. It is said that Galileo dropped objects off the Leaning Tower of Pisa to determine whether heavy or light objectsıfall faster. If Galileo had dropped a 5.0-kg cannon ball to
the ground from a height of 12 m, what was the gravitational potential energy of the
cannon ball before he dropped it?

Aparticle with mass 1.81×10−3 kg and a charge of 1.22×10−8 c has, at a given instant, a velocity v⃗ =(3.00×104m/s)j^. what are the magnitude and direction of the particle’s acceleration produced by a uniform magnetic field b⃗ =(1.63t)i^+(0.980t)j^?

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 the force applied to an object remains constant, is more power needed for the object to move faster ? explain