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[tex]Prove that energy remains constant in the case of freely falling bodies. What is the work done by a \ \textless \ br /\ \textgreater \ man weighing 60 kg and carrying a box weighing 20 kg on his head and travelling a distance of 10 m. \ \textless \ br /\ \textgreater \ a. In the vertical direction, \ \textless \ br /\ \textgreater \ b. On the (horizontal) ground which is frictionless. (g = 9.8 m/s2 \ \textless \ br /\ \textgreater \ ) [/tex] |
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