Wind erosion

a- removes fertile topsoil
b- happens slowly in dry climates
c- can be reduced by cutting down trees
d- creates oxbow lakes and deltas

The coefficient of friction is a number that represents the resistance to sliding between two in contact with one another.

For which pair of objects would adding the same a

Students design a model roller-coaster track. they place a rubber ball at the highest point on the track and let it go. the ball rolls along the track pulled only by the force of gravity. eventually, it comes to a stop. which change to the design will result in the ball moving the greatest distance?