the coefficient of friction between a car and dry pavement is approximately 0.7, but the coefficient on wet…

the coefficient of friction between a car and dry pavement is approximately 0.7, but the coefficient on wet pavement is 0.4 or less. what does this indicate about driving on wet pavement?\na a car’s normal force is less on wet pavement.\nb a car’s normal force is greater on wet pavement.\nc a car requires less applied force to move on wet pavement.\nd a car requires more applied force to move on wet pavement.

the coefficient of friction between a car and dry pavement is approximately 0.7, but the coefficient on wet pavement is 0.4 or less. what does this indicate about driving on wet pavement?\na a car’s normal force is less on wet pavement.\nb a car’s normal force is greater on wet pavement.\nc a car requires less applied force to move on wet pavement.\nd a car requires more applied force to move on wet pavement.

Answer

Brief Explanations:

The coefficient of friction ((\mu)) relates to frictional force ((F_f = \mu F_N), where (F_N) is normal force). For a car, (F_N) (normal force) is approximately equal to its weight (so same on dry/wet pavement, eliminating A and B). A lower (\mu) (0.4 vs 0.7) means lower frictional force. To move, the applied force must overcome friction. Lower friction on wet pavement means less applied force is needed to move (C) or more force would be wrong (D, as less friction needs less applied force to overcome it). Wait, correction: Frictional force (F_f=\mu F_N). On wet pavement, (\mu) is lower, so (F_f) is lower. So to move the car (overcome friction), less applied force is needed (since friction opposing motion is less). So option C: "A car requires less applied force to move on wet pavement."

Answer:

C. A car requires less applied force to move on wet pavement.