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Calculate the kinetic energy of a car of mass 750kg moving with a velocity of 72km/hr find the kinetic energy if the velocity of car becomes 3times |
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Answer» MASS of car=750kg VELOCITY=72 km/hr ×5/18=20m/s kinetic energy=1/2×m×v×v kinetic energy=1/2×750×20×20 kinetic energy=750×20×10 kinetic energy=150000J if velocity BECOME three TIMES then v=72×3=216km/hr×5/18=60 m/s then kinetic energy=1/2×m×v×v kinetic energy=1/2×750×60×60 kinetic energy=750×60×30 kinetic energy=1350000J |
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