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Grade: 11
        
a meter stick of mass 400g is pivoted at one end displaced through an angle of 60 degree .then what amount of potential energy increases
3 years ago

Answers : (1)

Vikas TU
10558 Points
							
Initial P.E = mgl/2 = > 0.4*10*1/2 = 2 Joules.
At 60 degree angle ,
P.E. = mgl(1-cos60)/2 = > 0.4*10*1(1-0.5)/2  => 1 Joules.
Hence the potential energy get decreased by = 2 – 1 = 1 Joue instead of increasing.
3 years ago
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