Moderate

Average velocity of a object after a completing a circle of 5 m radius in 5 seconds:

Correct answer: C. Zero

  • A.
  • B. π
  • C. Zero
  • D. 10π

Explanation

When an object completes a full circle, it returns to its starting point. Therefore, the displacement of the object is zero. The average velocity is defined as the displacement divided by the time taken. Since the displacement is zero, the average velocity is also zero.

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Displacement, velocity and acceleration describe motion, including the horizontal and vertical components of projectile motion. The chapter connects these quantities with Newton's laws, momentum and impulse, then applies conservation of momentum to collisions, distinguishing elastic collisions from inelastic ones.

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