A body of mass 2 kg is being dragged with uniform velocity of 2 m/s on a rough horizontal plane. The coefficient of friction between the body and the surface is 0.20. The amount of heat generated in 5 sec is \[(J=4.2\,joule/cal\] and \[g=9.8\,m/{{s}^{2}})\] [MH CET (Med.) 2001]

• A.                         9.33 cal                       
• B.                         10.21 cal            
• C.                         12.67 cal                     
• D.                           13.34 cal