Answer:
\[m=40\,\,g=\frac{40}{1000}kg=\frac{1}{25}kg,\,\,u=0\]
\[v=1200\,\,m/s\]
\[F=144\,Nn=?t=1s\]
\[F=n\,\,ma=n\,\,m\left( \frac{v-u}{t} \right)\]
\[\Rightarrow 144=n\left( \frac{1}{25} \right)\left( \frac{1200-0}{1} \right)\]
\[\Rightarrow 144=\frac{n}{25}\times 1200\]
\[n=\frac{144\times 25}{1200}=3\]
Hence n = 3.
You need to login to perform this action.
You will be redirected in
3 sec