Question

In which situation will the friction between an object and the surface on which it is moving be decreased? a. the object is pushed over a longer distance b. the weight of the moving object is decreased c. the object is pushed with greater force against the surface d. the surface on which the object is moving is made smoother Please put answers in the comments of actual answers, as I need them! Lots of points! 63 points

Answer 1

d. the surface on which the object is moving is made smoother

This is called lubrication, I think ...

b. the weight of the moving object is decreased

If there is less araea of contact because of the weight reduction ("squeezing together") then this could also have an effexct. I thinl though the thrust of the q is on lubrication = oil, talcum powder, thin films of water etc

Please put answers in the comments of actual answers, as I need them! Lots of points! 63 points