Calculate the force acting on the ball, if the mass of the ball is\[200\,\,g\].
A) \[1\,\,N\]
B) \[2\,\,N\]
C) \[5\,\,N\]
D) \[8\,\,N\]
Correct Answer: A
Solution :
The graph shows that the initial velocity of the ball \[u=0\] and\[t=0\] From the graph, the final velocity of the ball after \[4\] seconds\[=v=20\,\,m\,\,{{s}^{-1}}\] We know that,\[F=ma=m\left( \frac{v-u}{t} \right)\] \[=\frac{1}{5}\left( \frac{20-0}{4} \right)=\frac{1}{5}\times 5=1\,\,N\]
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