Which object would have the most momentum?

Momentum is proportional to an object's mass multiplied by its speed. Comparing the choices using weight as a measure of mass gives A: 500 × 20 = 10,000; B: 200 × 60 = 12,000; C: 100 × 80 = 8,000; and D: 50 × 100 = 5,000. Choice B, the 200-pound car moving at 60 miles per hour, has the greatest momentum.

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