Ashok 1000 kg exchanges speed from 36 km per hour to 72 km per hour into minutes calculate the work done by tension and its parts
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work done= final k.e - initial k.e
= 1÷2×72×1000 - 1÷2×36×1000
=36×1000 - 18×1000
= 36000-18000
=18000
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