Physics-
General
Easy
Question
A 4-kilogram disk slides over level ice toward the east at a velocity of 1meter per second, as shown. The disk strikes a post and rebounds toward the north at the same speed. The change in the magnitude of the eastward component of the momentum of the disk is
- –4 kg·m/s
- –1 kg·m/s
- 0 kg·m/s
- 4 kg·m/s
The correct answer is: –4 kg·m/s
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