question_answer

From the velocity-time graph find the force acting on a body of mass 100 g?

Answer:

\[m=100\,\,g=\frac{1}{10}kg\] \[u=30m/s\] \['t'=5\]sec is 0 \[\Rightarrow \]final velocity of the ball = v = 0 m/s \[F=?\] We know that, \[F=ma=m\left( \frac{v-u}{t} \right)\]     ……(1) \[\left( \because a=\frac{v-u}{t} \right)\] \[{{N}_{1}}\]Substituting the above values in (1), we have, \[F=\frac{1}{10}\times \left( \frac{0-30}{5} \right)\] \[\Rightarrow F=\frac{1}{10}\times -6\] \[=-0.6\,\,kgm/{{s}^{2}}=-0.6N\]