D Question 13 1 pts Following the last problem. Now, a cat, of mass 5 kg, falls asleep on top of block A. If block B is now set into downward motion, what is its acceleration magnitude and direction? ( free-fall acceleration g = 9.8 m/s^2) 0.25 m/s^2, upward 1.63 m/s^2, upward O 0.25 m/s^2, downward O 1.63 m/s^2, downward D Question 14 1 pts Is the following statement true or false? A friction force can only do negative work and gravity can only do positive work. True O False D Question 15 1 pts