The sled (m = 16.9 kg) shown in the figure leaves the starting point with a velo

Question

The sled (m = 16.9 kg) shown in the figure leaves the starting point with a velocity of 26.9 m/s. Use the work-energy theorem to calculate the sled?s speed at the end of the track or the maximum height it reaches if it stops before reaching the end. The straight sections of the track (A, B, D, and E) have a coefficient of friction of 0.409 with the sled, and 234.1 J are lost to friction in the circular section of the track (C).

Explanation / Answer

Sorry I cannot see the pic. The logic behind it is Initial KE = Work done by Friction + Change in potential Energy + Final Kinetic Energy Find max Work done by friction == Fx ==> Normal Reaction * mu * X (distance moved) So when frictional Force cannot be more than this you have it equal to PE + KE final

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