Two hockey pucks, labeled A and B, are initially at rest on a smooth ice surface

Question

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 2.50 m/s , and puck B moves with a speed of 4.30 m/s .

What is the distance covered by puck A by the time the two pucks collide?

What is x1, the distance that puck A covers prior to the collision? Express your answer in meters to three significant figures. Do not include units in your answer. Hints 0 X1 =

Explanation / Answer

The relative speed is 2.5+4.3=6.8 m/s.

So they will collide after the time t=18/6.8 =2.65 s.

By that time A will cover a distance of 2.5*2.65=6.618 m (ANS).

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