PDF chapter test TRY NOW
1. Suppose your writing desk is tilted a little. A book kept on it starts sliding down. Show the direction of frictional force acting on it.
a. The direction of frictional force will be .
b. The direction of frictional force is to the direction of a sliding force.
2. You spill a bucket of soapy water on a marble floor accidently. Would it make it easier or more difficult for you to walk on the floor? Why?
a. The floor is made smooth by the layer of soap, which friction.
b. The cause of friction is presence of .
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