4. how does an increase in orbital radius affect average orbital speed

The increase in orbital radius actually decreases the average orbital speed. This is a scientifically proven fact. The increase in orbital radius by 50 percent will decrease the average orbital speed by approximately 18 percent. On the other hand, the decrease in orbital radius will increase the average orbital speed.

Answer: it will take   4.36 seconds to reach her average velocity 10.69 miles/hour.explanation:   we have equation of motion ,where s is the displacement, a is the acceleration, u is the initial velocity and t is the time taken.average velocity = displacement/ time taken.average velocity = 10.69 miles/hr = 10.69*1.6*1000/(60*60) = 4.75 m/s4.75 = s/ts = 4. 1we also have acceleration = 2.18 m/s², initial velocity = 0 m/sso it will take   4.36 seconds to reach her average velocity 10.69 miles/hour.