John is on his skates coming home from school with his school bag on his back when he sees his mother and asks her to take the bag. He throws the bag for her to catch and is surprised when he recoils backwards. His school bag has a mass of 8 kg and is thrown with a velocity of 4.5 ms-1. John’s mass, including his skates, is 68 kg. His recoil velocity was about: A. 0.35 ms-1 B. 0.53 ms-1 C. 0.49 ms-1 D. 0.58 ms-1
