General Question

punkrockworld's avatar

What happens when you drop something on the bus?

Asked by punkrockworld (960points) April 13th, 2010

There are lots of reasons why people used to think the earth did not move. One specific arguments was that if the earth was spinning, and anybody dropped a penny, the earth would have spun about 1000 feet in the second it took for that penny to fall. Thus, the penny should land 1000 feet from you. This can be shown to be wrong by thinking about what happens if you drop something on the bus. What happens to it? And why is the penny dropping argument wrong?

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8 Answers

talljasperman's avatar

relativity relativity

Response moderated
Rarebear's avatar

Bus, Earth, and penny all move at the same velocity. When you drop the penny on the bus it looks like it’s falling straight down. If you’re an observer, though, watching the penny it will fall at a diagonal.

Jeruba's avatar

It’s moving at the speed of the bus when it drops.

absalom's avatar

The word your teacher is looking for is “inertia”.

beautifulbobby193's avatar

I’ve always liked discussing this topic, especially when it’s done solely to take the piss out of somebody and hear their explanation of why it doesn’t move. Many people will (incorrectly) say that it is because there is no wind passing through the bus.

DarkScribe's avatar

@beautifulbobby193 Many people will (incorrectly) say that it is because there is no wind passing through the bus.

Those people have not been on a bus in rural Mexico – have they?

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