Trying to Solve Part E Constants 1 Periodic Table Learning Goal: To practice Pro

Question

Trying to Solve Part E Constants 1 Periodic Table Learning Goal: 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 2.90 m/s, and puck B moves with a speed of 3.90 m/s What is the distance covered by puck A by the time the two pucks collide?

Explanation / Answer

Ans: AE

Even without solving the problem, we can conclude that the distance covered by puck A must be less than or equal to 18.0 . You can verify that your answer from Part D does satisfy this common­sense evaluation. In the future, whenever possible, use two simple methods, units check and common­sense evaluation, to assess your results. They will be useful in catching some incorrect answers without following the entire solution through. However, beware that these methods do not catch all incorrect answers.

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