a girl of mass 48 kg is rescued from a building fire by leaping into firefighters net. The window from which she leapt was 12 m above the net. she lands in the net so that she is brought to complete stopn in 0.45 seconds. during this interval (a). what is change in momentum? (b).what is impulse on net due to girl? (c).what is average force on net due to girl?

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