A body moves from point P(3, 4) to Q(5, 7). Its displacement vector would be:
Correct answer: D. Option D
- A. Option A
- B. Option B
- C. Option C
- D. Option D
Explanation
The following is the solution: Position vector P = OP = 3i + 4j Position Vector Q = OQ = 5i + 7j Displacement vector = PQ = OQ - OP PQ = 5i + 7j - (3i + 4j) PQ = 5i + 7j - 3i - 4j PQ = 2i + 3j
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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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