In The Moon
Which of newton law helped explain the orbit of space shuttle around earth and orbit of earth aroun the sun?
MOSTLY the first law: Every object in a state of uniform motion tends to remain in that state of motion unless an external force is applied to it. This is not the only reason,… there are also more. What happens is that in the case of the Earth orbiting the Sun, the Earth wants to go in a straight line tangent to its orbit at any given moment, but the reason why is goes in a "circle" is because the Sun's gravity is pulling the Earth toward it. The Earth doesn't plummet into the Sun because the balance between the Earth's velocity, the distance from the Earth to the Sun and the strength of the Sun's gravity. Newton's "law" of universal gravitation ... not one of the Big Three ... describes orbital shapes and motion, and generates all three of Kepler's Laws of planetary motion. (MORE)