Chapter 7, Problem 7.13E

CP A 10.0-kg microwave oven is pushed 6.00 m up the sloping surface of a loading ramp inclined at an angle of 36.9° above the horizontal, by a constant force $\stackrel{\to }{F}$ with a magnitude 110 N and acting parallel to the ramp. The coefficient of kinetic friction between the oven and the ramp is 0.250. (a) What is the work done on the oven by the force $\stackrel{\to }{F}$ (b) What is the work done on the oven by the friction force? (c) Compute the increase in potential energy for the oven, (d) Use your answers to parts (a), (b), and (c) to calculate the increase in the oven’s kinetic energy, (e) Use ${\displaystyle \sum \stackrel{\to }{F}}={\displaystyle \sum \stackrel{\to }{a}}$ to calculate the oven’s acceleration. Assuming that the oven is initially at rest, use the acceleration to calculate the oven’s speed after the oven has traveled 6.00 m. From this, compute the increase in the oven’s kinetic energy, and compare it to your answer for part (d).