Also called an “endless ropeway,” the cable car was invented by Andrew S. Hallidie, who first operated his system in San Francisco, California, in 1873. A cable car moves because of its cable, which runs continuously in a channel, between the tracks located just below the street. The cable is controlled from a central station, and usually moves about 9 miles (14.5 kilometers) per hour. Each cable car has an attachment, on the underside of the car, called a grip. When the car operator pulls the lever, the grip latches onto the moving cable and is pulled along by the moving cable. When the operator releases the lever, the grip disconnects from the cable and comes to a halt when the operator applies the brakes.
- How does an escalator work?
- Why are they called skyscrapers?
- How do elevators work?
- What is the tallest building in the world?
- How is steel used in skyscrapers?
- What is the Nobel Prize?
- Why are there different religions and how did they spread?
- What was the Industrial Revolution?
- What is a patent?
- What is the difference between an invention and a discovery?
- Which state was once an independent kingdom?
- Where can you stand in four states at the same time?
- Which state has the most people?
- Which is the largest state in area, and which is the smallest?
- How can you travel across Alaska’s miles of snow?
- Why do states have names and nicknames?
- Is the District of Columbia a state?
- Why do women in some countries wear veils?
- Which states were not organized as territories first?
- How did the United States begin?
