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1. A girl is carrying a school bag of \(3\ kg\) mass on her back and moves \(200 m\) on a levelled road. The work done against the gravitational force will be (\(g\ =\ 10\ m s^{–2}\))
2. An iron sphere of mass \(10\ kg\) has the same diameter as an aluminium sphere of mass \(3.5\ kg\). Both spheres are dropped simultaneously from a tower. When they are \(10\ m\) above the ground, they have the same
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