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A brick of mass m=0.49 kg is set against a spring with a spring constant of k1 = 639 N/m which has been compressed by a distance of 0.1 m


A brick of mass m=0.49 kg is set against a spring with a spring constant of k1 = 639 N/m which has been compressed by a distance of 0.1 m. Some distance in front of it, along a frictionless surface, is another spring with a spring constant of k2 = 261 N/m. 

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Part (a) How far, d2 in meters, will the second spring compress when the brick runs into it?  

Part (b) How fast, v in meters per second, will the brick be moving when it strikes the second spring?

Part (c) Now assume that the surface is rough (that is, not frictionless). You perform the experiment and observe that the second sprig only compresses a distance dy/2. How much energy, in joules, was lost to friction? 

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