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Kriti
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Gravity does negative work upward and positive work downward. Initial kinetic energy is 400 J, while work done by gravity is minus 388 J. The work done by air resistance equals minus 12 J.

ball of mass 2 kg is thrown up with a velocity of 20 m s-1class 9 science exploration chapter 7 workenergy and simple machines exercise solutionsncert class 9 science exploration chapter 7 question answersign of the work done by gravity on the ball during its upward motion
Ayushree
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The correct filled terms are force and displacement for part one, one for part two, half m v square for part three, m g h for part four and rate for part five respectively.

class 9 science exploration chapter 7 workenergy and simpleenergy and simple exercise solutionsexpression for kinetic energy of a body of mass m and velocityin the direction of forcencert class 9 science exploration chapter 7 question answersample question from class 9 chapter 7 work