Physics - Heat & Thermo Question with Solution | TestHub

A small block of mass m is kept at the left edge of a plank of mass 2m. The upper surface of the plank is rough $(\mu =0.6)$, but the surface in contact with the ground is smooth. Both the plank and block are made of same material. The length of plank is 10 m. The block is projected with a speed ${\mathrm{V}}_0$ parallel to the length such that maximum heat is dissipated. The specific heat capacity of the material is 2000 J/kg °C. Assume that no heat is lost to the surroundings and the temperature of both the bodies remains same at all the times.