A body moves in semi-circle of radius 4. What is the displacement of the body?
Correct answer: C. 8cm
- A. 7cm
- B. 9cm
- C. 8cm
- D. 12cm
Explanation
Option C is correct.The displacement of a body is the shortest distance between its initial and final positions. In this case, the body starts at point A and moves in a semi-circle to point B. The shortest distance between A and B is the diameter of the circle, which is 2r where radius is 4m. 2 * 4 = 8 units.
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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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