Question

A student wants to use the inclined plane to measure the coefficient of friction but he was not supplied with a protractor. He measures the height h and the horizontal distance of the free end of the plane from the floor x when the wooden block on the plane just begins to move. Which of the following correctly gives the coefficient of friction?

A. h/x
B. sin(h/x)
C. tan(h/x)
D. cos(h/x)