Randall D. Knight — Interactions and Potential Energy: Problem 69

In Problems 67 through 69 you are given the equation used to solve a problem. For each of these, you are to a. Write a realistic problem for which this is the correct equation. b. Draw the before-and-after pictorial representation. c. Finish the solution of the problem. Equation 69: \(\frac{1}{2}(0.50 \text{ kg})v_f^2 + (0.50 \text{ kg})(9.80 \text{ m/s}^2)(0 \text{ m}) + \frac{1}{2}(400 \text{ N/m})(0 \text{ m})^2 = \frac{1}{2}(0.50 \text{ kg})(0 \text{ m/s})^2 + (0.50 \text{ kg})(9.80 \text{ m/s}^2)((-0.10 \text{ m}) \sin 30^\circ) + \frac{1}{2}(400 \text{ N/m})(-0.10 \text{ m})^2\)