How does the length of a rope string or fishing line affect the balance of a mobile kinetic sculpture?

Compare the horizontal displacement of the two balls as they travel to the ground. what do you observe?

If an electric circuit is not grounded it is best to reach out and touch it to provide the ground a.true or b.false

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?