An  athlete  slides  down from  rest  40.0  meter  along an  icy  hill  which  is  35 degrees  from  the  horizontal.   He  then  continues sliding  on  the  level  ice.  a) If  the  coefficient of  kinetic  friction  between  the  athlete  and  ice is  0.20  (neglect  air  resistance) find  speed (m/s)    of  athlete  at  the  foot  of  the  plane.      b) )   find  the  distance  (m) from  the  foot  of  the  plane  to  the  point where  he  has  landed  to  the level  ice

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Newton’s Third Law of Motion

The horse pulls the cart and the cart pulls the horse in response as per Newton third law. So the big question is, “Don’t the two forces cancel each other? How does the cart accelerate?”