Year help: what is the average speed of a comet?

not-jonny

what is the average speed of a comet?

I’ve got a physics ESSAY 2moz (eep) and I need to know this. we’re doing gcse practice in YEAR 9. 2 years early. its friggin crazy. anyway help please i had a look around google and can only find how to calculate it, but i just need a general speed. cheers,
Not-Jonny

This open post was written 3 months, 2 weeks ago | V/U/S: 329, 9, 7 | Edit Post | Leave a reply | Report Post

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Since writing this post not-jonny may have helped people, but has not within the last 4 days. not-jonny is a verified member, has been around for 5 months, 1 week and has 5 posts and 58 replies to their name.

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google, physics, Cheers, Comet, List of Internet slang phrases, Year, general, Find, speed, Velocity (How Tags Affect Reciprocity)

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Anonymous #
3 months, 2 weeks ago (4 minutes after post)

Omg why is one headed for our planet? or do you just need help with your homework?

jcd 3 #
Atlanta, GA, US | 3 months, 2 weeks ago (5 minutes after post)

It would probably depend on the size and composition of the comet, what it’s orbiting, what other objects and gravitational forces it passes close to, etc.

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not-jonny 0 #
An Unknown Location | 3 months, 2 weeks ago (5 minutes after post)

just help with hwk lols

not-jonny 0 #
An Unknown Location | 3 months, 2 weeks ago (7 minutes after post)

thats what i thought jcd, but not what the sheet says. grrg

Anonymous #
3 months, 2 weeks ago (38 minutes after post)

Well, if the sheet doesn’t specify and it’s not in your textbook or your teacher didn’t tell you, just write some smart answer like “About 20 miles per hour” or something.
By the way, doing that might not be a good idea.

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AdamMartinEdwardson 7 #
An Unknown Location | 3 months, 2 weeks ago (3 days, 1 hour after post)

Anonymous wrote:
OMG WHY IS ONE HEADED FOR OUR PLANET? or do you just need help with your homework?

there is in 2039, just incase you were wondering…

and as for the speed of a comet, that is a ridiculous question, it could be anything! i dont personally have a clue, i’d guess at 40,000 miles per hour?

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i_eat_glas #
An Unknown Location | 3 months ago (1 week, 6 days after post)

Comet speed depends on where it is in its orbit. A comet near the Sun will go much faster than that same one orbiting far away, as gravitational potential energy has been converted to kinetic energy. Something near the Sun will be moving anywhere from 30 to 100 km/s.

Have a look at http://www.lpl.arizona.edu/impacteffe… . It gives 51 km/s for a comet impacting Earth. That’s about 30 miles per second. Note that that is NOT “per hour.” Big difference.

You could use that number directly and specify where in the orbit it is, but for a physics paper you might want to use Kepler’s laws to figure out the minimum, maximum, and average speeds.

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what is the average speed of a comet?

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