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# The figure shows the position-time graph of a body of mass 0.04 kg. Suggest a suitable physical context for this motion. What is the time between two consecutive impulses received by the body? What is the magnitude of each impulse?

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#### The graph could be representing a ball rebounding between two walls separated by 2 cm with a constant velocity in free space. After receiving the impulse ball changes its direction. Hence time between two impulses is 2 seconds. $$velocity = \frac{displacement}{time} = \frac{2 \times 10^{-2}}{2} = 0.01 \ m/s$$Initial momentum, $$mu = 0.04 \times 10^{-2} \ kgm/s$$ Final momentum, $$mv = - 0.04 \times 10^{-2} kgm/s$$ $$\therefore$$ Change in momentum = 0.08 \times 10^{-2} kgm/s 

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