18. REASONINGThe magnitude of the gravitational force that each part exerts on the other is given by Newton’s law of gravitation as 212/FGmmr=. To use this expression, we need the masses m1and m2of the parts, whereas the problem statement gives the weights W1and W2. However, the weight is related to the mass by W= mg, so that for each part we know that
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This note was uploaded on 01/29/2010 for the course CALC 01:640:135 taught by Professor Soffer during the Spring '08 term at Rutgers.