The friends consider a block of mass 1.1 kg set in motion by an external force. The initial velocity is 1.6 m/s, and the coefficient of kinetic friction is 0.03. What do they find as the final change in internal energy of the system once the block comes to a complete stop

Explanation:

The given data is as follows.

         Final K.E = 0,    

and,    Initial K.E =

So, we will calculate the initial kinetic energy as follows.

         Initial K.E =      

                       =

                       = 1.408 J

Now, we will calculate the change in kinetic energy as follows.

        = Final K.E - Initial K.E

                      = 0 - 1.408 J

Thus, we can conclude that the change in kinetic energy is 1.408 J.

think its the third option