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Ask iit jee aieee pet cbse icse state board community Community Discussion Question: 85.what is F1 / F2
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niki61 (0)

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1A block is kept on a smooth inclined plane of angle 30 degree that moves with a constant acceleration so that the block does not slide relative to the inclined plane. Let F1 be the contact force between the block and the plane. now the inclned plane stops and let F2 be the contact force between the two in this case. Then F1 / F2 is


Ans- 4/3


please give me detail answer

    
pink_ele (1380)

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case 1-
when incline is in motion
den along d incline eqn is
macos30=mgsiin 30
also
F1=masin30+mgcos 30=mgsin 30 tan 30+mg cos 30
also
F2=mgcos 30.....
F1/F2=(mgsin 30 tan 30+mg cos 30)/mg cos 30
=(1/2rt3+rt3/2)rt3/2=4/3
cheers!


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