Chapter 08, Problem 053 In the figure, a 3.3 kg block is accelerated from rest b

Question

Chapter 08, Problem 053 In the figure, a 3.3 kg block is accelerated from rest by a compressed spring of spring constant 630 N/m. The block leaves the spring at the spring's relaxed length and then travels over a horizontal floor with a coefficient of kinetic friction k 0.210. The frictional force stops the block in distance D-7.6 m, what are (a) the increase in the thermal energy of the block-floor system, (b) the maximum kinetic energy of the block, and (c) the original compression distance of the spring? D (4k) No friction (a) Number (b) Number (c) Number l Click if you would like to Show Work for this question: Units Units Units Qpen Show Work

Explanation / Answer

(A) fk = uk N = uk m g

fk = 0.210 x 3.3 x 9.81 = 6.80 N

increase in thermal energy = 6.80 x 7.6 = 51.7 J

(B) KEmax = 51.7 J

(C) PEmax = 51.7 J

630 x^2 /2 = 51.7

x = 0.405 m

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