Steel shuttle pulled along square steel rail by elastic cord
A machine has an 760 g steel shuttle that is pulled along a square steel rail by an elastic cord . The shuttle is released when the elastic cord has 25.0N tension at a 45 degree angle.
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You run a race with your friend. At first you each have the same kinetic energy, but then you find that she is beating you. When you increase your speed by 29%, you are running at the same speed she is. If your mass is 90 kg, what is her mass?
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When the temperature of a "copper" penny (which is not really copper) is raised by 100 C, its diameter increases by 0.18%. a). What is the coefficient of linear expansion?
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