Newton's third law: If an object A exerts a force on ____, then object B must exert a force of equal magnitude and opposite direction back on ____We can readily see Newton’s ____ law at work by taking a look at how people move about. Consider a swimmer pushing off from the side of a pool. The ____ pushes against the pool ____ with her feet and accelerates in the direction ____ to that of her push. The wall has exerted an equal and opposite ____ back on the swimmer. If the swimmer pushes harder against the wall, then she will ____ at a ____ rate, because the wall will push back ____ on her. If you want to jump into the ____ you have to push ____ on the ground. The ____ will put an equal and ____ force on you, so you will go ____.When you walk you push ____ on the ground. The ground puts and equal and opposite force on you so that you will move ____. To swim forwards in the water you must ____ the water backwards. The ____ then puts an equal and opposite force forwards on you. To swim ____, you need a ____ force forward so that you have to put a bigger force backwards on the water.

U3 Newton's Third

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