29/05/2011 15:40

Guess what?  Gravity is also a force and it acts upon us every day, only we don't usually notice.  Check out the video for the Giant Drop, a theme park ride at Dreamworld on the Gold Coast of Australia.


 So how does this relate to roller coasters?  Well it's like a vertical roller coaster and it helps to demonstrate how gravity exerts a force on people (and everything else) just like acceleration.  


Force = mass x acceleration

Force of gravity = mass x acceleration due to gravity


On earth, the acceleration due to gravity is 9.8 meters per second per second downwards.