Which of the following does the force of friction NOT depend? -the nature of the two surfaces in contact
-the surface area of the two surfaces in contact
-the normal force pressing the two surfaces together
-smoothness of the two surfaces

What is a good example of instantaneous speed

Acar drives toward the right over the top of a hill, as shown below. which arrow represents the centripetal acceleration? w x y z

Which of the following changes will increase the capacitance of a parallel-plate capacitor? (there could be more than one correct choice.) a) increase the charge on the plates b) decrease the poten5al between the plates c) increase the potential between the plates d) introduce a dielectric material between the plates e) decrease the separation between the plates