Trip to amusement park but still have homework

Trip to amusement park but still have homework. Such a nice teacher uh!?
About the Newton's 3 law of example: When I do the Roller coaster one. My body will move forward when the coaster started and when the coaster stop in the moment, my body will move front. Because of the Newton's first law.
F=ma is Newton second law and I also have an example. The free drop things, there have 20 seat in that machine. If we pretend the average of 20 people's weight is 20, we need 9800N to carry people up. Because of the mass is 10000kg; acceleration is 9.8m/s2. To put in the formula " F=ma" and we can got 9800N.
I think there are some facilities need to do with kinetic and static friction although all of facilities are work by electricity.
For example, the facility which the boat go up in to the volcano and go down. I've noticed that when the machine bring us on need to stop in the tiny second, and I guess may be the machine is pushing the boat until against to the static friction. After the boat move then the machine don't need to spend that many force to push the boat because of the kinetic force is smaller that the static force.