A small block of mass 250 g starts at rest at A, slides to B where its speed at point B is 6.50 m/s, then slides along the horizontal surface a distance 10.0 m before coming to rest at C. (a) What is the work of friction along the curved surface? Wf = J (Don't forget to use the correct sign!) (b) If the curved distance is 7.50 m, then estimate the average friction force on the block. f = N (c) What is the coefficient of kinetic friction along the horizontal surface? μk =
