Question

11. A book keeping on your writing desk starts sliding due to tilting of the
desk. Show the direction of the frictional force acting on it.
12. You spill a bucket of soapy water on a cemented floor accidentally. Would
it make easier or more difficult for you to walk on the floor? Why?
13.Explain why sportspersons use shoes with spikes.
14. Explain why sliding friction is less than static friction.
15. Give examples that friction is both harmful and useful.
16. Explain why objects moving in fluids must have special shapes.​

Answer 1

Answer:

oof....... god

this is not a valid answer