△K+AU+△E.=M W=-s?? 2. If the block is pulled by a string and moves with constant velocity. o> f=T For the system block table △E nt block+table Wr is responsible for increasing the internal energy (temperature) of the block and table Ch 13 Energy III: Conservation of energyCh.13 Energy III: Conservation of energy 2. If the block is pulled by a string and moves with constant velocity. f=T W f s??? f = − f v T For the system = block + table Eint,block+table =WT K + U + Eint = Wext WT is responsible for increasing the internal energy (temperature) of the block and table