일반물리학 1 — Potential Energy and Conservation of Energy: Problem 65

65 A particle can slide along a track with elevated ends and a flat central part, as shown in Fig. 8-47. The flat part has length \( L = 40 \text{ cm} \). The curved portions of the track are frictionless, but for the flat part the coefficient of kinetic friction is \( \mu_k = 0.20 \). The particle is released from rest at point \( A \), which is at height \( h = L/2 \). How far from the left edge of the flat part does the particle finally stop?