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November 01, 2025, 09:07:48 am
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Author Topic: inclined plane q.  (Read 1427 times)  Share 

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simplicity123

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inclined plane q.
« on: June 07, 2009, 06:00:53 pm »
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hey regarding this question, im asked to work the tension btwn the coupling.
I worked it out using a free body diagram of the boat+trailer

0=T-mgsin20 - 200
0=T-(8000sin20) - 200
T=2.93x10^3N

I was just wondering how to do a free body diagram for the car instead of the trailer, I cant seem to figure out the driving force.
I know that
0 = Driving force - T - 1200sin20 - 300

thanks in advance =]
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kamil9876

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Re: inclined plane q.
« Reply #1 on: June 07, 2009, 06:08:05 pm »
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you've done the hard bits, just sub in the value of T you worked out and  all you have is an equation with Driving Force as unkown:) Remember that Magnitude of Tension is equal in both directions(pulling car and pulling truck) and so u can use the value of T worked out previously.
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Voltaire: "There is an astonishing imagination even in the science of mathematics ... We repeat, there is far more imagination in the head of Archimedes than in that of Homer."

simplicity123

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Re: inclined plane q.
« Reply #2 on: June 07, 2009, 06:14:32 pm »
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oh so theres no other way to figure out the driving force before finding the tension?

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naved_s9994

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Re: inclined plane q.
« Reply #3 on: June 07, 2009, 06:18:45 pm »
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whats the question...confused (soz)
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danieltennis

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Re: inclined plane q.
« Reply #4 on: June 07, 2009, 06:27:30 pm »
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Wait, to calculate the Driving force of the car, you don't need to determine the tension whatsoever. However, you need to use the total mass of the trailer and the car and the total frictional forces.

Is that what you mean?
« Last Edit: June 07, 2009, 06:31:12 pm by daniel. »
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simplicity123

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Re: inclined plane q.
« Reply #5 on: June 07, 2009, 06:43:18 pm »
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ohh yea 4got that u had to use the total mass and retarding forces for the driving force. I was too focused on the car itself xD

thx!
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methodsboy

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Re: inclined plane q.
« Reply #6 on: June 08, 2009, 12:10:35 pm »
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this question is gud
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