Yellow Sweater Speed: 6 m/s Yellow Sweater Speed: 12 m/s
(sped up by 6 m/s)
Purple Sweater Speed: 0 m/s
Purple Sweater Speed: 6 m/s
(sped up by 6 m/s)
2 Three skiing accidents happened while skiers were moving across flat, snowy ground
with almost no friction. These skiers changed speed as a result of being bumped. The
skier in red slowed down by 6 m/s. The skier in yellow sped up by 6m/s. The skier in
purple started moving, for a total change of 6 m/s.
a. Did the skiers experience different forces when they were bumped?
b. How do you know?