1. Why does spreading feet apart help a surfer stay on the board? 2. What is the minimum speed for orbiting Earth in a close orbit? What is the maximum speed? What happens above this speed? 3. How was...

1. Why does spreading feet apart help a surfer stay on the board?

2. What is the minimum speed for orbiting Earth in a close orbit? What is the maximum speed? What happens above this speed?

3. How was Pioneer 10 able to escape the solar system with an initial speed less than escape speed?