2025 · Q25
Which one among the following statements is not correct?
General KnowledgePhysics
- AAll bodies in the universe attract each other due to the gravitational force.
- BNewton's law of gravitation follows from Newton's laws of motion
- CThe value of g (acceleration due to gravity) at the centre of the Earth is zero.
- DMass and weight are measured in different units.
Explanation
Newton's law of universal gravitation is an independent empirical law; it does not follow logically from the three laws of motion, so statement 2 is false. Gravitation is indeed a universal force acting between all masses, the acceleration due to gravity is zero at the Earth's centre, and mass (kilogram) and weight (newton) have different units — so statements 1, 3 and 4 are true. Newton stated it in the Principia (1687), after he had already formulated his three laws of motion.