Questions
A plank AB of length l is gently released on a knife edge at 0 as shown in the figure. If is made , the angular acceleration of the plank just after it is released is
detailed solution
Correct option is D
Mass of segment AO, m1=m4Mass of segment BO, m2=3m4M = Net moment about O=3mg4×3l8−mg4×l8=14 mglI0=13(m4)(l4)2+13(3m4)(3l4)2=748ml2∴ Angular acceleration, α=MI0=14mgl748ml2=127 glTalk to our academic expert!
Similar Questions
A body is placed on a horizontal frictionless surface. When a horizontal force F is applied on the body, it is observed that the body makes only translational motion. The which of the following points may be the positions of its centre of mass?
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