Multiple choice

A particle moves on straight path, it returns to starting point after 10 sec. The total distance covered is 30 m then what is not true about the motion of the body?

  1. The displacement of the body is zero.

  2. The average velocity is zero.

  3. The displacement of the body is 30 m.

  4. The average speed of the body is 3m/s.
Reveal answer Fill a bubble to check yourself
C Correct answer
Explanation

If the particle returns to the starting point, displacement is 0. Average velocity = displacement / time = 0. Average speed = distance / time = 30 / 10 = 3 m/s. Option C claims displacement is 30m, which is false.

AI explanation

Since the particle returns to its starting point, its displacement, which is the shortest distance between the initial and final positions, is zero, making option A true and option C false. Average velocity equals displacement divided by time, so the average velocity is zero divided by 10, which makes option B true. Average speed is total distance divided by total time, giving 30 divided by 10, which equals 3 m/s and makes option D true; therefore, the false statement is that the displacement is 30 m.

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