A35 g steel ball is held by a ceiling-mounted electromagnet 4.0 m above the floor. a compressed-air cannon sits on the floor, 4.8 m to one side of the point directly under the ball. when a button is pressed, the ball drops and, simultaneously, the cannon fires a 25 g plastic ball. the two balls collide 1.0 m above the floor. part a what was the launch speed of the plastic ball?

Rosa records the distance that a toy car rolls and the time it takes to cover the distance. what scientific practice is this? collecting data asking a question providing explanations communicating results

What are the three ways that an object can accelerate

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.