Physics
Grade-10
Easy
Question
Which of the following the universal law of gravitation does not explain?
- The motion of planets around a star
- Attraction and repulsion between magnets
- Everything on the earth put together
- High and low tides
Hint:
Gravitational law is related to gravitational pull n\and the effects of it.
The correct answer is: Attraction and repulsion between magnets
The correct option is b)Attraction and repulsion between magnets.
According to Newton's law of universal gravitation, every object in the universe attracts every other object. The attractive force between two objects is proportional to the product of their masses and inversely proportional to the square of the distance between them. The direction of this force is along the line connecting the centers of the objects.
Attraction and repulsion between magnets was a part of law of magnetism. The most basic law of magnetism is that like poles repel and different poles attract. This can be easily verified by placing the poles of the two magnets in the same way. In addition, there are other magnetic effects.
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