Physics · Engineering Mechanics
Two forces P and Q act simultaneously at a point with angle θ between them, combining via the parallelogram law. In a gravitational system, two masses attract each other with equal and opposite forces. Which statement explains the fundamental principle behind both?
- 1Both rely on Newton's third law only.
- 2Both demonstrate that forces are independent of their points of application.
- 3Both show that forces are vector quantities and combine according to vector addition laws.✓
- 4Both prove that resultant force always acts along the line joining the centers of masses.
Correct answer
Both show that forces are vector quantities and combine according to vector addition laws.
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