If the wind applies a force of 13.2 lb to the sign at the geometric center of the sign surface, will the sign tip over? if so, how much evenly distributed weight (sand bags) should be added to the base of the sign to keep it from tipping when the wind blows?

Two identical stars with mass m orbit around their center of mass. each orbit is circular and has radius r, so that the two stars are always on opposite sides of the circle. (a) find the gravitational force of one star on the other. (b) find the orbital speed of each star and the period of the orbit. (c) how much energy would be required to separate the two stars to infinity?

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?

Which of these is the best way to manage a natural resource