1) What is force? a) Push b) Pull c) Squeeze d) Stretch e) All the above 2) Name two types of friction a) Normal friction, tension b) Kinetic and static friction c) Hiding friction, pulling friction 3) The force exerted by a string or rope when it is stretched a) Friction b) Tension c) Collision 4) The force that opposes relative motion of two bodies. a) Magnetic forcr b) Mechanical force c) Friction 5) Friction always opposes motion a) True b) False 6) The force exerted by a charged body on another charged body a) Gravitational force b) Electrostatic force c) Magnetic force 7) Lubricants a) Grease b) Milk c) Water 8) Grooving a) Method of increasing friction b) Method of devreasing friction 9) We are able to hold object because of a) Force b) Friction 10) The force produced by a machine a) Collision force b) Applied force c) Mechanical force 11) Friction can be reduced byby a) Polishing b) Making surface rough 12) The SI unit of force is? a) Joule b) Newton 13) Non- Contact force a) Gravitational force b) Tension c) Normal force 14) Name two types of kinetic friction a) Shutting friction, moving friction b) Rolling frictipn, sliding frictipn. 15) Factors affecting friction a) Nature of the surface in contact b) Weight of the body c) All the above

Force & friction

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