displacement of an object in moving around a complete circle is:
Correct answer: D. zero
- A. 2pi r
- B. 2r
- C. pi r
- D. zero
Explanation
Displacement is a vector quantity so it depends on direction and in a circle the initial point is the same as the final position so the net displacement is zero which is option D.
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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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