Answer:
\[F=10kg.\,\,wt=10\times 9.0N=98N\] \[t=2s,\,\,v=10m/s;\,\,m=?\] Now \[a=\frac{v}{t}=\frac{10}{2}=5m/{{s}^{2}}\] \[\therefore m=\frac{F}{a}=\frac{98}{5}kg=19.6kg\]
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