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A force of 100N is applied on an object of mass 15kg moving at a velocity of 10m/s for 10 second find the final velocity of the object |
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Answer» 49500jExplanation: Acceleration a = F/m = 100/10= 10ms-2 Final velocity v = U + at = 10+ 10×9= 10+90= 100ms-1 Initial KINETIC ENERGY= 0.5×mu2 = 0.5× 10×10××10 =500J Final kinetic energy = 0.5×mv2 = 0.5×10×100×100= 50000J CHANGE in kinetic energy = 50000-500= 49500J |
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