Acceleration simply means a change in speed, whether faster or slower. |
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ok, in my physics class i was asked to give the relation of a trolley's acceleration depending on slope angle. |
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Ok. If you tile the slope this way: \, it speeds up. Tilt it this way ---, it stays stationary. This way, /, speeds up. |
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I would draw the forces and build up from that. Newton's second law and all that. |
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Okay, say the slope is at angle @ to the horizontal. There is a weight force of the trolley which acts vertically downwards, equal to Mg where M is the mass of the trolley. To find the component of this force in the direction of the slope, you need to multiply the force by sin@. Then to find the acceleration you divide this force by the mass of the trolley M, so a = Msin@g/M = gsin@. |
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Last edited by Xei; 06-10-2009 at 06:05 PM.
I think he already knows that |
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thanks guys, thats a massive help |
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thanks guys, thats a massive help |
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woops, that must have been because i was using my phone to do it. dont know how though, if i clicked it twice it should come up with an error message. |
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Last edited by slash112; 06-10-2009 at 07:56 PM.
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well, i took the equation which i got from xei and Specialis Sapientia, but i didnt quite understand how they got to it, i did in a way so i was able to come up with a way i understand better. and it was right, so thanks you two. |
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How did you get it? I don't think there's really any other way than resolving the force parallel to the slope. |
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well, when i say a different way i mean different substitution of f=ma etc. |
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Yes you resolve the force in the direction parallel to the slope and then use F=ma. That's the only way of doing it... |
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How do you figure that? |
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