Leaving the distance between the 201 kg and the 616 kg masses fixed, at what distance from the 616 kg mass (other than infinitely remote ones) does the 51 kg mass experience a net force of zero? Answer in units of m.

The rocket is fired vertically and tracked by the radar station shown. when θ reaches 66°, other corresponding measurements give the values r = 32700 ft, r¨ = 85 ft/sec2, and θ˙ = 0.019 rad/sec. calculate the magnitudes of the velocity and acceleration of the rocket at this position.