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Question

plus comledugenlstudentlmainfr.uni waeypuusa MYwuleaPLUS I Hee I contact us I Log Cutnell, Physics, 10e GENERAL PHYSICS 1 AND 2 (PHYS 209/22 Grace Period: 14 days left I Register No onment Gradebook ORION MESSAGE MY INSTRUCTOR FULL SCREEN PRINTER VERSION BACK Chapter 06r Problem 20 Go A 18-kg is being pulled along the horizontal snow-covered by a hori of 31 N. sled speed of 2.9 ms in 8.2 m. Find the coefficient of kinetic friction between the runners of the sled and the snow. force Starting from rest, the attains a is +/-2% Question Attempts: 0 of 10 used SAve rom LArrr ITANS maple NET Coov right c 2000-2016 by John w sons,

Explanation / Answer

Here ,

mass of sled , m = 18 Kg

horizontal force , F = 31 N

final speed , v = 2.9 m/s

distance ,d = 8.2 m

let the coefficinet of kinetic friction is u

Using work energy theorum

(F - u * m * g) * distance = kinetic energy

(31 - u * 18 * 9.8) * 8.2 = 0.5 * m * v^2

(31 - u * 18 * 9.8) * 8.2 = 0.5 * 18 * 2.9^2

solving for u

u = 0.1234

the coefficient of kinetic friction is 0.1234

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