re9/22/2017 06:00 PM 62.2/1009/19/2017 05:30 PM Question 13 of 16 Map didb Sapli

Question

re9/22/2017 06:00 PM 62.2/1009/19/2017 05:30 PM Question 13 of 16 Map didb Sapling Learning A heavy sled is being pulled by two people as shown in the figure. The coefficient of static friction the sled and the ground is it-o 595, and the kinetic friction coefficient is = 0.411 . The combined of the sled and its load is m = 366 kg The ropes are separated by an angle 23°, and they make an angle -30.8° with the horizontal tension required to get the sled moving? mass both ropes pull equally hard, what is the minimum rope Number 13 If this rope tension is maintained after the sled starts moving, what is the sled's acceleration? m/s Tools

Explanation / Answer

a] Balancing forces in horizontal,

T cos 30.8 degree + T cos (30.8+23) degree = us*mg

T * [ cos 30.8 degree + cos 53.8 degree ] = 0.595*366*9.8

T = 0.595*366*9.8/ [ cos 30.8 degree + cos 53.8 degree ]

= 1472 N

b] acceleration a = Fnet/m = [0.595*366*9.8- 0.411*366*9.8]/366

= 1.8032 m/s^2

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