A car is at rest on a horizontal road. What is the value of the frictional force? Explain your answer.
A bison stands at rest on the horizontal ground. What is the value of the frictional force? Explain.
The normal force always has a direction perpendicular to the surface that is causing the normal force. Is the normal force on your feet always directed straight up? If not, give an example of when it isn't.
Thank you so much!