A block of mass \[m=1\text{ }kg\]is moving with a constant acceleration \[a=1\text{ }m/{{s}^{2}}\]on a rough horizontal plane. The coefficient of friction between the block and plane is\[u=0.1\]. The initial velocity of block is zero at\[t=0\]. The power delivered by the external agent at a time t = 2 sec from the beginning is equal to \[\left( Takeg= 10m/{{s}^{2}} \right)\]

• A. 1 watt
• B. 2 watt
• C. 3 watt
• D. 4 watt