# AST101H1 Lecture : chapter 4

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But mass also plays a role a person pushing a bike with a child riding=bike will move faster a person pushing a bike with an adult riding=bike moving much slower. Newtons 2nd law of motion affects momentum becuse: since an unbalanced force causes acceleration, which is a change in velocity, then force also changes momentum. 3rd law----forces act in equal and opposing pairs you push down on the ground when u walk and the ground pushes up towards your feet. 3 basic terms on how an object is moving. 1)speed- how far a car will go in a certain time (100km/hr) 3)acceleration- if the speed or direction change (slowing speed or change in direction is negative acceleration. Galileo- demonstrated that gravity accelerates all objects by the same amount regardless of their mass. Acceleration of gravity- acceleration of falling objects (g) *earth acceleration for falling objects is 10m/s* www. notesolution. com. An objects momentum is the product of its mass and velocity (momentum=mass*velocity)