A satellite travels in a circular orbit at a speed of 20,000 km/hr to stay at a constant altitude. To escape from the earth, the speed would have to be increased to.?
A satellite travels in a circular orbit at a speed of 20,000 km/hr to stay at a constant altitude. To escape from the earth, the speed would have to be increased to.?
A. 40,000 km/hr B. 28,000 km/hr C. 21,000 km/hr D. 64,000 km/hr