1) The force that acts in the opposite direction of motion when two surfaces come in contact. a) friction b) force c) static d) kinetic 2) Friction is a force that acts in an ______________ direction of movement. a) similar b) opposite c) parellel d) west 3) How does friction affect speed? a) more friction decreases speed b) more friction increases speed c) less friction decreases speed d) none of these 4) What does friction produce? a) light b) speed c) heat d) gravity 5) When can we say that the friction on a floor is greater? a) if the floor is wet b) if the floor is tiled c) if the floor is rough d) if the floor is smooth 6) What type of friction occurs when an object is not moving? a) Static Friction b) Sliding Friction c) Rolling Friction d) Fluid Friction 7) A friction that acts on objects when they are sliding over a surface. a) Static Friction b) Sliding Friction c) Rolling Friction d) Fluid Friction 8) A friction that acts on objects that are moving through a fluid. a) Static Friction b) Sliding Friction c) Rolling Friction d) Fluid Friction 9) A friction that acts on objects when they are rolling over a surface. a) Static Friction b) Sliding Friction c) Rolling Friction d) Fluid Friction 10) Does standing have friction? a) YES b) NO

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