Please provide steps, not just theanswer, thanks! A bobsled run leads down a hil

Question

Please provide steps, not just theanswer, thanks!

A bobsled run leads down a hill assketched in the figure above. Between points A and D, friction isnegligible. Between points D and E at the end of the run, thecoefficient of kinetic friction is µk =0.4. The mass of the bobsled with drivers is 210kg and it starts from rest at point A.

Find the distancex beyond point D at which the bobsled will come toa halt.

Explanation / Answer

From A to D,conservation of energy => (1/2).m.v^2 =mgh (1) From D and the position the bobsled become to a halt : (1/2).m.v^2 = F(f).x = .mg.x   (2) (1),(2) => mgh = mgx => x= h/ = 50/0,4 =125 cm

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