Medium
$A$ particle of mass $50 \, g$ moves on a straight line. The variation of speed with time is shown in the figure. Find the force acting on the particle at $t = 2, 4,$ and $6 \, s$.
- A$0.25 \, N$ along motion,zero,$0.25 \, N$ along motion
- B$0.25 \, N$ along motion,zero,$0.25 \, N$ opposite to motion
- C$0.25 \, N$ opposite to motion,zero,$0.25 \, N$ along motion
- D$0.25 \, N$ opposite to motion,zero,$0.25 \, N$ opposite to motion
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