An object of mass 2kg, moving with a velocity of 12 m/2, collides head-on with a stationary object whose mass is 6g. If the collision is elastic, what are the final velocities of the two objects? Negate friction

Bernie drove home from a vacation in 1.5 hours. he traveled a total distance of 60 miles. what was his average speed in miles per hour? a. 60 mph b. 90 mph c. 40 mph d. 55mph

Can you match these to the correct definition

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?