What is the net force?, 20 N to the right, 8 N to the left, 8N to the right, 16 N to the right, Why does a comb rubbed with dry hair do this?, It becomes magnetic after rubbing, The papers are pulled by gravity, Air pressure pushes paper toward the comb, It becomes electrically charged after rubbing, A book kept on a table is not moving because, No force acts on it, Forces are balanced, The book has no mass, The book is too heavy to move, Pressure is, Mass × Gravity, Force ÷ Area, Area ÷ Force, Force × Area, A sharp knife cuts better because it, has smaller surface area, reduces friction, has more mass, it is made of metal, Which exerts more pressure?, standing on one foot, standing on both feet, Why do divers wear special suits?, due to gravity, to look better, to increase friction, protect from high pressure.

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