Answer:
\[m=100\,\,g=0.1\,\,kg\]
\[v=20\,\,m/s,\,\,t=0.01\,s\]
Now \[a=\frac{V}{t}=\frac{20}{0.01}m/{{s}^{2}}=2000m/{{s}^{2}}\]
\[\therefore \,F=m\,\,a=0.1\times 2000\,\,N=200\,\,N\]
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