The poverty and illiteracy of jamaican people
If there is snow on the hill a sled or toboggan can be used to ride down a hill.
ride
Sled.
it depends on how fast you ride or if your gowing up a hill
Going up a hill would make your acceleration decrease or cause it to be slow. Going down a hill would make acceleration increase causing you to go faster.
That depends on the ride .
So they can have momentum for the rest of the ride. If there was no big hill, then you would constantly have to be pulled by the chains, and that's no fun. But if there is a big hill at the start of the ride, then you go down, down, down, and have enough of that speed/momentum that will keep you gliding along.
friction
Almost all roller coasters rely on gravity for the ride. Once the cars are lifted over the rise, they just 'coast' down hill, through twists, turns, loops and and all the fun parts of the ride until the end - constantly slowing down during the ride.
Because you have to overcome gravity on your way up.
i dont think you can