Why newton’s first law is sometimes called the law of inertia? a.) because inertia is the same thing as friction b.) because inertia is the tendency of objects to resist changes in their motions c.) because inertia describes the application of force to an object in motion d.) because inertia describes the application of force to an object at rest save

Identify the correct relation showing that the radius r of the orbit of a moon of a given planet can be determined from the radius r of the planet, the acceleration of gravity at the surface of the planet, and the time τ required by the moon to complete one full revolution about the planet. determine the acceleration of gravity at the surface of the planet jupiter knowing that r = 71 492 km and that t= 3.551 days and r= 670.9 × 10^3 km for its moon europa.