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A body of mass 2 Kg, initially at rest, moves under the influence of an external force of magnitude 4 N on plane ground. What is the work done by the force and the change in kinetic energy in the first 10 seconds?(a) 400 J, 400 J(b) -400 J, 400 J(c) 400 J, -400 J(d) -400 J, -400 JThe question was asked in a national level competition.This key question is from Work-Energy Theorem in chapter Work, Energy and Power of Physics – Class 11 |
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Answer» The CORRECT choice is (a) 400 J, 400 J |
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