A heavy chain of length 4.00 m and mass per unit lenth of 1.48 kg/m lies lengthw

Question

A heavy chain of length 4.00 m and mass per unit lenth of 1.48 kg/m lies lengthwise in a hallway of a classroom building. A student then begins slowly pulling the leftmost link toward the right on a line parallel to the chain until the chain is once again straight. Then the student continues to pull the chain for another 1.4m. The force that the student uses to pull the entire chain along at a constant speed is 15.3N.
a.)What is the coefficient of kinetic friction between the floor and the chain?

b.)What is the force the student has to apply to the chain as a function of (x), defined in the picture, as she is doubling the chain back on itself?

c.)What is the total work done by the student on the chain? Hint: you may just have to use some calculus here…

Explanation / Answer

coefficient of kinetic friction between the floor and the chain?

72

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