Multiple choice

Two cars A and B start from the same point and move at speeds of 30 m/s and 15 m/s, respectively. What is the distance between them after 3 seconds?

  1. 45 m

  2. 15 m

  3. 30 m

  4. 90 m
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A Correct answer
Explanation

Since the cars move in the same direction from the same point, their relative speed is 30 - 15 = 15 m/s. The distance between them after 3 seconds is distance = speed * time = 15 * 3 = 45 m.

AI explanation

Assuming both cars move in the same direction, we use the relative speed concept by subtracting the slower speed from the faster speed, giving 30 m/s minus 15 m/s, which equals 15 m/s. The distance between them after 3 seconds is calculated using Distance equals Speed multiplied by Time. This yields 15 m/s multiplied by 3 seconds, resulting in a distance of 45 m.

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