Alarge ball of steel has a mass of 500 kg. a smaller ball of steel of mass of 75 kg is placed some distance from the larger ball. the force of gravitation between them is given by f = gmm/r2 compare, as a ratio, the force of gravity between the balls when they are placed 15 m apart and 20 m apart. a) 9/16 b) 16/9 c) 4/3 d) 3/4

What is relative velocity? in which condition is relative velocity known by adding the velocity of the first body and that of the second body

Aparticle moves in a circle 1.50 m in radius . through what angle in radians does it rotate if it moves through an arc length of 2.50m? what is the angle in degrees?

According to an observer on earth, planet x is stationary. maria and samir depart earth on their spaceships at the same time, each flying at 0.5c. maria flies toward planet x and samir flies in the opposite direction. according to maria, her voyage to planet x takes 9 years. how many years does maria's voyage take according to samir?