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Rotational Motion question

2016 · Shift 1 · Q41
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  5. /2016 · Shift 1 · Q41

Rotational Motion question

2016 · Shift 1 · Q41

JEE AdvancedPhysicsRotational MotionMCQ+3 / −1
A uniform wooden stick of mass 1.6 kg and length lll rests in an inclined manner on a smooth, vertical wall of height h ( <lll) such that a small portion of the stick extends beyond the wall. The reaction force of the wall on the stick is perpendicular to the stick. The stick makes an angle of 30∘30^\circ30∘ with the wall and the bottom of the stick is on a rough floor. The reaction of the wall on the stick is equal in magnitude to the reaction of the floor on the stick. The ratio hl{h \over l}lh​ and the frictional force f at the bottom of the stick are ( g =10 ms-2 )
  1. A
    hl=316,f=1633N{h \over l} = {{\sqrt 3 } \over {16}},f = {{16\sqrt 3 } \over 3}Nlh​=163​​,f=3163​​N
  2. B
    hl=316,f=1633N{h \over l} = {3 \over {16}},f = {{16\sqrt 3 } \over 3}Nlh​=163​,f=3163​​N
  3. C
    hl=3316,f=833N{h \over l} = {{3\sqrt 3 } \over {16}},f = {{8\sqrt 3 } \over 3}Nlh​=1633​​,f=383​​N
  4. D
    hl=3316,f=1633N{h \over l} = {{3\sqrt 3 } \over {16}},f = {{16\sqrt 3 } \over 3}Nlh​=1633​​,f=3163​​N
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