1) The frictional force acts in a direction opposite to the motion. a) Correct b) Incorrect 2) A force cannot change the shape of an object. a) Correct b) Incorrect 3) Force can be used to change the speed of the object. a) Correct b) Incorrect 4) Gravitational forces do not allow us to stand straight on the floor. a) Correct b) Incorrect 5) The Frictional force increases on a smooth surface. a) Correct b) Incorrect 6) Force acting between the two charged bodies is called the magnetic force. a) Correct b) Incorrect 7) The magnet attracts iron. a) Correct b) Incorrect 8) A ball thrown upwards comes down due to Gravitational force. a) Correct b) Incorrect 9) Expansion of lungs when we inhale and exhale during breathing is an example of Gravitational force. a) Correct b) Incorrect 10) SI unit of force is Newton. a) Correct b) Incorrect 11) Gravitational force is an example of a contact force. a) Correct b) Incorrect 12) The frictional force is an example of a contact force. a) Correct b) Incorrect

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