Multiple choice

The earth revolves around the sun, the center of solar system, at about 30 m/s. Is the earth in accelerated motion?

  1. No, as acceleration is a vector.

  2. No, as the net displacement is zero.

  3. Yes, as the speed is not constant.

  4. Yes, as the velocity is not constant.

  5. The data is insufficient.
Reveal answer Fill a bubble to check yourself
D Correct answer
Explanation

Acceleration is defined as the rate of change of velocity. Both acceleration and velocity are vector quantities. As the direction of the earth's motion is constantly changing, so is velocity changing and thus earth is in accelerated motion.

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