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Grade: 11
        
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  1. A body of mass ‘m’ is dropped from a height ‘h’ reaches the ground with a velocity . The work done by the air resistance is

one year ago

Answers : (1)

Vikas TU
6869 Points
							
From WET that is Work Energy Theorem,
W = Change in K.E
Hence,
Wair res. + Wmgh = 0.5m(gh/2) – 0
Wair. res. = 0.5m(gh/2)  – mgh => mgh/4 – mgh => -3mgh/4 J 
one year ago
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