2007-05-13 13:39:36 · 4 answers · asked by Love.Angel.Music.Baby 3 in Science & Mathematics ➔ Physics
It's harder to get something to move once it's stopped. While it is moving a roller coaster has kinetic energy so it doesn't need as much energy to continue it's route.
2007-05-13 13:48:09 · answer #1 · answered by Anonymous · 2⤊ 0⤋
To keep the roller coaster moving at the same speed on a level track, a force matching the kinetic friction is required. Then the roller coaster will continue at constant speed. (Assume the velocity to be maintained is very slow so that wind resistance is negligible.)
To move a stopped roller coaster on a level track, a force exceeding the static friction is required. Static friction generally is higher than kinetic friction. So it's harder to get a stopped roller coaster to move.
2007-05-13 14:25:10 · answer #2 · answered by sojsail 7 · 1⤊ 0⤋
Read carefully a description of inertia and you will have the answer.
2007-05-13 13:46:17 · answer #3 · answered by Anonymous · 0⤊ 0⤋
very hard because I am scared of heights
2007-05-13 13:47:08 · answer #4 · answered by ? 2 · 0⤊ 0⤋