- #1
charlygarcia
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Homework Statement
A heavy sled is being pulled by two people as shown in the figure. The coefficient of static friction between the sled and the ground is μs = 0.603, and the kinetic friction coefficient is μk = 0.395. The combined mass of the sled and its load is m = 291 kg. The ropes are separated by an angle φ = 23°, and they make an angle θ = 31.1° with the horizontal. Assuming both ropes pull equally hard, what is the minimum rope tension required to get the sled moving?
If this rope tension is maintained after the sled starts moving, what is the sled\'s acceleration?
Homework Equations
F = ma
The Attempt at a Solution
I tried to draw a free body diagram and add the tensions and then substract the friction. I divided 23° by 2, but I'm not sure if that's correct. To get the minimun tension required to get the sled moving I used μs.
I got this equation at the end but I guess it's wrong because I still can't get the right answer for the minimum tension:
2T cos 31.1+ 2T cos 11.5 = μs ( mg - 2T cos 31.1)