Re: Need help devising an easy physics question that sounds really har
 

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I'm more interested in how you measure total force in Joules.

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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.

Re: Need help devising an easy physics question that sounds really har
 

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whats the answer to the fly thing.

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Im guessing 80 miles since the trucks crash into each other in an hour, and the fly is traveling 80 miles an hour

Re: Need help devising an easy physics question that sounds really har
 

multiple choice question, pleas provide answers!!!!

Re: Need help devising an easy physics question that sounds really har
 

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Is this a level? It's been a while since I took physics but isn't the result of F = ma measured in joules?

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The SI unit used to measure force is the newton (symbol N), which is equivalent to kg·m·s−2.

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Joules is a unit of energy. Energy =/= force.

Re: Need help devising an easy physics question that sounds really har
 

[ QUOTE ]
[ 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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Yes, I assumed it was the 2nd case, but the correct answer is 6000 joules not 400 (30 meters total displacement x 20kg x 10m/s^2).

Re: Need help devising an easy physics question that sounds really har
 

[ QUOTE ]
[ QUOTE ]
Is this a level? It's been a while since I took physics but isn't the result of F = ma measured in joules?

[ QUOTE ]
The SI unit used to measure force is the newton (symbol N), which is equivalent to kg·m·s−2.

[/ QUOTE ]

[/ QUOTE ]

Joules is a unit of energy. Energy =/= force.

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Crap, I meant to say "newton."

Re: Need help devising an easy physics question that sounds really har
 

Force = mass x accelleration = kg m/s^2
Mechanical energy = Force x distance = kg m^2/s^2

Re: Need help devising an easy physics question that sounds really har
 

I wanna see this magical 80 mph fly

Re: Need help devising an easy physics question that sounds really har
 

[ QUOTE ]
[ QUOTE ]
[ 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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Yes, I assumed it was the 2nd case, but the correct answer is 600 joules not 400 (30 meters total displacement x 20kg).

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You're forgetting about the acceleration of gravity. You have to multiply by 9.8m/s^2 to get energy

Edit: look like you just noticed that

Re: Need help devising an easy physics question that sounds really har
 

Is the cat dead or alive?