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Subjects
Science CBSE
Class 9
Work and energy
Textbook based HOTS II
26.
Multiple choice question XXVI
Exercise condition:
2
m.
A boy of mass \(40\ kg\) runs upstairs and reaches the roof at height \(8\ m\) in \(5\ s\) (Take \(g\ =\ 10\ ms^{−2}\)). Calculate the work done by him against gravity.
\(200\ J\)
\(400\ J\)
\(320\ J\)
\(3200\ J\)
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