Week # 2

On a roller coaster the ascent is the time when you feel the heaviest, the Fa (applied force) is greater than Fg ( force of gravity) and are working against each other. On the way down from a very tall height while going at a tremendous speed ( the amount of distance over a period of time) the Fa is greater than gravity ( the force which the earth pulls on objects) and they are both going in the same direction. NLUG (Newton's Law of Universal Gravitation) devises that gravity is 6.67x10^-11 but if an applied force is greater than this in the same directions objects can become weightless.

1. If the pilot were to disengage from the circle he would continue in a path ______ to the circle ?

A. Tangent *

                                              B. Perpendicular

                                              C. continuous circle

2. How can NLUG be used?

                                             A. To find Universal Gravitation

                                             B. To find the speed at which the earth travels

                                             C. All of the above *

3.  How fast does the earth move ?

                                              A. 107471992.32 m/s *

                                              B. 100 m/s

                                              C. 9653 m/s