Calculus based physics problem. (energy and fricition)

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The problem involves a 3.8 kg block sliding on a frictionless track before encountering friction at a higher level. The initial speed of the block is 6.9 m/s, and it experiences a height difference of 1.2 m with a coefficient of kinetic friction of 0.649. Energy transferred to thermal energy is calculated as 45.771 J, with a normal force of 37.24 N and kinetic energy due to friction at 24.168 J. To find the distance d that the block travels before stopping, the work-energy principle can be applied using the equation W = fd, where W represents the work done by friction. The discussion focuses on how to effectively use the calculated values to solve for d.
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In the figure, a 3.8 kg block slides along a track from one level to a higher level after passing through an intermediate valley (frictionless). The track is frictionless until the block reaches the higher level. There a frictional force stops the block in a distance d. The block's initial speed is v0 = 6.9 m/s, the height difference is h = 1.2 m, and μk = 0.649. Find d.

i've already found that energy transferred to thermal energy is 45.771 J, the normal force = 37.24 and the KE frictional force = 24.168 J but I'm not sure what to do with these numbers.
 
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I think you use W = fd. But, I'm not sure how.
 
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