EVERYDAY SCIENCE

Detailed explanation-1: -Since its size does not appear to change, its distance stays about the same, and hence its orbit must be close to a circle. To keep the Moon moving in that circle–rather than wandering off–the Earth must exert a pull on the Moon, and Newton named that pulling force gravity.

Detailed explanation-2: -The moon revolves around the earth in a similar way but due to the velocity with which the moon got hooked onto the earth’s gravity keeps it from falling onto the earth. This keeps the moon in a pretentious orbit around the earth even though it is moving further away from our planet by an ever so little margin.

Detailed explanation-3: -The moon’s velocity and distance from Earth allow it to make a perfect balance between fall and escape. In case the velocity of rotation of the moon was a little bit faster, it would have escaped the Earth’s Gravity.

Detailed explanation-4: -Newton found the Moon’s inward acceleration in its orbit to be 0.0027 metre per second per second, the same as (1/60)2 of the acceleration of a falling object at the surface of Earth.

Detailed explanation-5: -Newton’s law of universal gravitation states that two bodies in space pull on each other with a force proportional to their masses and the distance between them. For large objects orbiting one another-the moon and Earth, for example-this means that they actually exert noticeable force on one another.