A block of mass 100   g slides on a rough horizontal surface. If the speed of the block decreases from 10   m   s - 1 and 5   m   s - 1 the thermal energy developed in the process is

Step-by-step solution

According to the energy conservation, the heat(thermal energy) produced is equivalent to the loss in kinetic energy of the block. Thus, thermal energy, H = 1 2 m v 1 2 - v 2 2 H = 1 2 100 × 10 - 3 10 2 - 5 2 H = 3 . 75   J