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Homework Statement
The problem states that there is a father pulling a 100 lb sled with a force of 100 lb at some angle. At what angle does the father have to pull in order for the sled to accelerate at 25 ft/s^2? The coefficient of kinetic friction here is given as 0.04.
Homework Equations
F = ma
The Attempt at a Solution
https://imgur.com/a/UQzd11W
My solution is in the attached image. I did a basic free body diagram and then did a summation of forces in the x and y directions. I solved for N since we do not know it and I tried to isolate for theta, but my answer contradicts the one I see given in the back of the book.
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