Question

Which law best describes why the planets are pulled toward the Sun and orbit it? Newton's law of universal gravitation Kepler's law of ellipses Newton's 2nd law of motion Newton's 3rd law of motion

Answer 1

Answer:

Newton's law of universal gravitation

Explanation:

As we know that all planets revolve around the sun in such a way that sun will provide essential centripetal force to all the planets

this force is given by Newton's universal law of gravitation

$U = \frac{Gm_1m_2}{r^2}$

Kepler's law of ellipse : it says that all planets revolve around the sun in elliptical path such that the sun lies at one of its focii.

Newton's 2nd law : As per Neton's 2nd law we know that net force on an object is product of mass and its acceleration.

Newton's 3rd law : Every action has equal and opposite reaction.

So here correct answer would be

Newton's law of universal gravitation

Answer 2

Newton's universal law of gravitation says that the force acting upon (and therefore the acceleration of) an object toward Earth should be inversely proportional to the square of its distance from the center of Earth.