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#11
08-07-2007, 03:14 PM
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Re: Need help devising an easy physics question that sounds really har
[ QUOTE ]
[ QUOTE ] Standard one is two trucks are driving toward each other. Each travels at 50 mp/h. At a distance of 100 miles apart a fly takes off from the windshield of one truck traveling toward the other at 80 mp/h. When it reaches the other truck it instantly turns around and flies toward the first - this continues until the trucks collide. What total distance does the fly cover? [/ QUOTE ] This is poorly worded. It's not clear if the fly is moving 80 mph relative to the ground or 80 mph relative to the truck it flew off. [/ QUOTE ] ok...nsert "relative to the ground" 
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#12
08-07-2007, 03:18 PM
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Re: Need help devising an easy physics question that sounds really har
A dalmatian (20 kg) is dropped 20 meters into a vat of lime Jello. When it enters the Jello, it decelerates and comes to a stop 10 m deep. What is the total Jello force acting upon the dalmatian?
a) 100 Newtons b) 200 N c) 400 N d) 800 N
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#13
08-07-2007, 03:21 PM
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Re: Need help devising an easy physics question that sounds really har
[ QUOTE ]
A dalmatian (20 kg) is dropped 20 meters into a vat of lime Jello. When it enters the Jello, it decelerates and comes to a stop 10 m deep. What is the total Jello force acting upon the dalmatian? a) 100 Joules b) 200 J c) 400 J d) 800 J [/ QUOTE ] I think I understand what you're trying to say, but wtf?
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#15
08-07-2007, 03:21 PM
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Re: Need help devising an easy physics question that sounds really har
[ QUOTE ]
[ QUOTE ] [ QUOTE ] Standard one is two trucks are driving toward each other. Each travels at 50 mp/h. At a distance of 100 miles apart a fly takes off from the windshield of one truck traveling toward the other at 80 mp/h. When it reaches the other truck it instantly turns around and flies toward the first - this continues until the trucks collide. What total distance does the fly cover? [/ QUOTE ] This is poorly worded. It's not clear if the fly is moving 80 mph relative to the ground or 80 mph relative to the truck it flew off. [/ QUOTE ] ok...nsert "relative to the ground" [/ QUOTE ] Isnt that just a math problem and not a physics problem? Just ask some stupid question like, If the sun was the size of a basketball how far away would pluto be, and then multiple choice like 60 feet, 60 yards, 6 miles, 60 miles (Im not sure what the answer would be, but its obviously the last one)
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#16
08-07-2007, 03:22 PM
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Re: Need help devising an easy physics question that sounds really har
I'll do the work out if there's demand for it. The answer is C.
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#17
08-07-2007, 03:22 PM
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Re: Need help devising an easy physics question that sounds really har
whats the answer to the fly thing.
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#20
08-07-2007, 03:27 PM
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Re: Need help devising an easy physics question that sounds really har
[ QUOTE ]
I'm more interested in how you measure total force in Joules. [/ QUOTE ] Me too. I'm not sure whether he's asking for the average force that operated on the dalmatian as it was being slowed down by the Jello, or the total energy absorbed by the jello. Either way it's not a difficult problem, but I don't think he even knows what he is asking.
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