Work Energy Power

JEE Main level, single correct, medium

30 of 183

Question 30 of 183

A particle of mass 100 g100 \mathrm{~g} is thrown vertically upwards with a speed of 5 m/s5 \mathrm{~m} / \mathrm{s}. the work done by the force of gravity during the time the particle goes up is

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Answer: (C) −1.25 J-1.25 \mathrm{~J}

−mgh=−mg(v22g)=−1.25 J-m g h=-m g\left(\frac{v^2}{2 g}\right)=-1.25 \mathrm{~J}

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