A body moves from point P(3,4) to Q (5,7). Its displacement vector would be:
Correct answer: D. 2i+3j
- A. 8i+10j
- B. 8i+2j
- C. 2i-2j
- D. 2i+3j
Explanation
Option D is correct.The displacement vector is the difference between the initial and final positions of the body. In this case, The initial position is P(3,4) and The final position is Q(5,7). The displacement vector can be calculated using the following formula: displacement = (final position - initial position) Placing the values in the formula, we get: displacement = (5i,7j) - (3i,4j) = (2i,3j) Therefore, the displacement vector is (2,3). This means that the body has moved 2 units to the right and 3 units up.
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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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