ASTRO 7N MIDTERM 1 questions well answered 2024

ASTRO 7N MIDTERM 1UNIT 1 - correct answer Gravity - correct answer Newton's First Law - correct answer An object at rest, or in motion in a straight line at a constant speed, will remain in that state unless acted upon by a force Newton's Second Law - correct answer The acceleration of a body due to a force will be in the same direction as the force, with a magnitude directly proportional to its mass Force = mass x acceleration Newton's Third Law - correct answer For every action, there is an equal and opposite reaction The Sun exerts force on planets, and they orbit it — the planets exert equal force on Sun, but it only moves slightly because of its very large mass relative to the planets Surface Gravity on a Planet - correct answer g = M / R 2 where M is the mass of the planet and R is its radius more mass = more gravity larger separation = less gravity Newton's Universal Law of Gravitation - correct answer The force of gravity between two objects is directly proportional to the product of the two masses and inversely proportional to the square of the distance between them and acts along a line joining their centers F = M1M2/d^2 more mass = more gravity