To practice Problem-Solving Strategy for general problems. Two hockey pucks, lab

Question

To practice Problem-Solving Strategy for general problems. Two hockey pucks, labeled A and B, are initially at rest on a smooth ice surface and are separated by a distance of 18.0 m. Simultaneously, each puck is given a quick push, and they begin to slide directly toward each other. Puck A moves with a speed of 3.10 m/s, and puck B moves with a speed of 5.10 m/s. What is the distance covered by puck A by the time the two pucks collide? What is x_1, the distance that puck A covers prior to the collision?

Explanation / Answer

Separation r = 18 m

Relative velocity V = 3.1 m/s + 5.1 m/s

= 8.2 m/s

Time taken to reach two pucks t = r / V

= 18 / 8.2

= 2.915 s

Therefore the distance covered by puck A is X1 = 3.1 x2.915 = 6.80 m

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