Question

what are the problems we may face if there is no rotation and revolution​

Answer 1

Answer:

If the Earth did not rotate, one half of the Earth would always be hot and bright, and the other part would be frozen and dark. The Earth also moves around the sun. This movement is called a revolution, which is different from rotation

Explanation:

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Answer 2

Over several billion years, this force, which effectively pushes outwards, has made the planet a bit fatter around the middle. So the diameter of the Earth measured through the equator is today about 21.4 kilometres more than the diameter of the Earth measured through the poles.

But this bulge in the solid Earth took billions of years to slowly develop. This is because the solid matter moved only very slowly in response to the outward force caused by the spin of the planet.

But the liquid water in the oceans is far more mobile and responsive to forces. So the Earth's spin has pushed up this liquid water to an 'abnormal' elevation of about eight kilometres