As depicted in the applet, Albertine finds herself in a very odd contraption. She sits in a reclining chair, in front of a large, compressed spring. T

Ernstfalld 2021-04-13 Answered
As depicted in the applet, Albertine finds herself in a very odd contraption. She sits in a reclining chair, in front of a large, compressed spring. The spring is compressed 5.00 m from its equilibrium position, and a glass sits 19.8m from her outstretched foot.
a)Assuming that Albertine's mass is 60.0kg , what is μk, the coefficient of kinetic friction between the chair and the waxed floor? Use g=9.80ms2 for the magnitude of the acceleration due to gravity. Assume that the value of k found in Part A has three significant figures.Note that if you did not assume that k has three significant figures, it would be impossible to get three significant figures for μk, since the length scale along the bottom of the applet does not allow you to measure distances to that accuracy with different values of k.
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Expert Answer

lamusesamuset
Answered 2021-04-15 Author has 93 answers

Mass of the albertine =60kg
Compressed length of the string (x)=5.0
Acceleration due to gravity (g)=9.8m/s2
From the principle of law of conservation of energy,
12kx2=μkmgs
μk=kx22mgs
=95.0 Nm(5.0 m)22(60.0 kg)(9.8 ms2)(19.8 m)
=0.102

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