A marble moves along the x -axis. The potential-energy function is shown in Fig. E7.36. (a) At which of the labeled x-coordinates is the force on the marble zero? (b) Which of the labeled x-coordinates is a position of stable equilibrium? (c) Which of the labeled x-coordinates is a position of unstable equilibrium?

Solution 38E Problem (a) Step 1: To find the coordinates(x) where force on the marble is zero Consider force on the marble is F to be zero, the slope of potential energy versus x must x be zero. Points b and d are having zero slope value on the graph. Therefore value of force is zero where x coordinates are (b) and (d). Problem (b) Step 1: To find the coordinates(x) where marble...