\(\therefore \,\,\,{P_2} - {P_1} = F \times t = 0.2 \times 10 = 2\,\, \Rightarrow \,\,{P_2} = 2 + {P_1} = 2 + 10 = 12\,\,\,kg{\text{ - }}m/s\)
ગતિ ઉર્જા માં થતો વધારો \( = \,\,\frac{1}{{2m}}(P_2^2 - P_1^2)\; = \frac{1}{{2 \times 5}}\left[ {{{(12)}^2} - {{(10)}^2}} \right]\, = \frac{{44}}{{10}} = 4.4\,J\)