just keep chasing it then use boxing ball to punch it and some will fly off then repeat until its all gone :-) i personly found it hard the first few times but you'll get it
the tracks
wood
yes; wherever the coaster touches the tracks there is static friction pressing against it and it pressing against the tracks, thus keeping it from flying off.
the tracks
Yes, in the tracks and the wheels the roller coaster cart rests on.
See the straight coaster picture and curve ones? Click on them to build a piece. Its the same as the turn tracks and straights.
The wheels are on top, between and below the tracks.
If its moving it has kinetic energy
There is a few principals that are looked at when building a roller coaster. Some principals that are looked at are what keep coaster cars flying around on their tracks, the tolls that keeps everything running and the forces that make the ride fun.
you have to get 5 stars on all of the tracks and then there is an arrow to the right of your screen....
Its very simple, first make to stations, its impossible to make two coasters, make your coaster so that the end it crosses over to switch tracks.
No, they are not powered (they need chains or launchers to get up the first hill) and therefore, they do not have engines.