1) Which of the following describes contact forces ? a) Forces that are equally distributed  b) Forces that occur when objects are touching  c) Forces that are occuring when objects are not touching  2) Which of the following examples describes applied forces ? a) Ahmed lifts a glass of water b) Airplane flying in the air c) A ball sliding on a rough surface 3) Which of the following describes frictional force ?  a) Two magnets attracted to each other   b) A paper airplane goes directly to the ground  c) A ball sliding on a rough surface 

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