Compute the work done during expansion of a gas from 4×10-3 m3 to 6×10-3 m3 , against constant external pressure of 2.02×105 N/m2
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A pulley system with a velocity ratio of 4 is used to lift a load of 150 kgf through a vertical height of 20 m. the effort required is 50 kgf in downward direction. Calculate: <br> (a) the distance moved by the effort. <br> (b) the work done by the effort. <br> (c) the mechanical advantage. <br> (d) the efficiency of the pulley system, and <br> (e) the total number of pulleys and the number of p
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