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4. A sled is pulled horizontally across the snow at constant velocity. The pulling
4. A sled is pulled horizontally across the snow at constant velocity. The pulling force is 40 N.
(Remember: Constant velocity means zero external forces)
a. What is the kinetic Frictional Force on the Sled?
b. if the weight of the sled is 200 N, what is the co-efficient of Kinetic Friction (us) between
the sled and snow?
c. If wood, weighing 300 N is placed in the sled, what pulling force is needed to move the
sled at constant velocity?
Show Answers
1. 2+0.5+2.5= 3. 2km/hr average
2. 14-6=4seconds. 8m/s in 4s = 2m/s acceleration
3. 15m/s divided by 2.5 = 6m/s acceleration