How to solve this problem a 1.5 kilg mass has just been dropped from a roof it has fallen 100 meters if I weigh 83 kilg and start running at 8 meters per sec as soon as object is realesed how far away can I stand and still catch the object

If anyone who can me with this hw? i would really appreciate it

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?

The record distance in the sport of throwing cowpats is 81.1 m. this record toss was set by steve urner of the united states in 1981. assuming the initial launch angle was 45° and neglecting air resistance, answer the following. (a) determine the initial speed of the projectile. m/s