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Got the right answer using a formula, but I don't know how to determine if the answer is going to be + or - I just took a guess. How do I properly determine if answer will be neg or pos? Formula is: T= rise x L / run Goal is to level a pump.
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reallylongnickname said: I thought I understood, but I don't. Since the feeler gauge is at that end of shaft, this would mean A rises. However, the Q is asking about be. So in this case, B would go lower, therefore B should be a negative shouldn't it??? View attachment 44612 Click to expand... Putting the shim at B rather than A would result in the opposite sign for t. What sign corresponds to which position is a sign convention that we are not privy to, I'm afraid.
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Example: In this pic, because feeler gauge (green tag) is located at that end of shaft, point A would need to rise to be level. However, if Q asks about B, then be would need to lower for shaft to ne level. Isn't this the case?????
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I thought I understood, but I don't. Since the feeler gauge is at that end of shaft, this would mean A rises. However, the Q is asking about be. So in this case, B would go lower, therefore B should be a negative shouldn't it???
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Ya, problem solved. It's all about where the feeler gauge is placed on the shaft which is directly related to the shim at A.
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topsquark said: That's just an equation. Where does the equation come from? Somewhere in the problem there is a chosen direction for positive. We can't know what that direction is either unless you can tell us more about the problem. -Dan Click to expand... I would use ... adding a shim at A results in a positive T
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That's just an equation. Where does the equation come from? Somewhere in the problem there is a chosen direction for positive. We can't know what that direction is either unless you can tell us more about the problem. -Dan
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Here's the math. The answer is correct, but how to determine if it will be
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Why not show us your work so we can help you figure out the correct sign??
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