Why do trains run on tracks?
Show answer & explanation
Answer: Steel on steel has low friction
Trains can't steer — Wrong. Trains don't steer because they don't need to—tracks handle direction. But that's not why tracks exist.
Steel on steel has low friction ✓ — Correct! Steel wheels on steel rails create very low friction, allowing trains to pull huge loads efficiently. A train can move 100 tons with the same energy a truck uses for 1 ton! Tracks also guide direction.
Roads can't support trains — Wrong. Roads can support heavy vehicles. Tracks exist for efficiency—steel on steel friction is far lower than rubber on asphalt.
More Transportation questions
- Why is it misleading to say that single-track vehicles like motorcycles mainly lean and stay stable because their wheels act like gyroscopes?
- Why does the front wheel of a leaned motorcycle often seem to find a useful steering angle without the rider holding it rigidly?
- Why can a tilted motorcycle tire help push the bike sideways through a curve instead of just rolling straight ahead?
- Why does taking the same motorcycle curve faster require noticeably more lean?
- Why does the bike-rider system need a lean angle when a motorcycle follows a steady road-speed curve?
- What actually happens just after a rider pushes the left grip forward to begin leaning a motorcycle left?