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Two persons of equal height are carrying a long uniform of of length l.They are at distance l/4 & l/6 from nearest end of the rod.The ratio of normal reaction at their heads is a) 2:3 b)1:3 c)4:3 d)1:2 Two persons of equal height are carrying a long uniform of of length l.They are at distance l/4 & l/6 from nearest end of the rod.The ratio of naormal reaction at their heads is a) 2:3 b)1:3 c)4:3 d)1:2

Two persons of equal height are carrying a long uniform of of length l.They are at distance l/4 & l/6 from nearest end of the rod.The ratio of normal reaction at their heads is

a) 2:3

b)1:3

c)4:3

d)1:2


 

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Two persons of equal height are carrying a long uniform of of length l.They are at distance l/4 & l/6 from nearest end of the rod.The ratio of naormal reaction at their heads is

a) 2:3

b)1:3

c)4:3

d)1:2

Grade:12

1 Answers

Ramesh V
70 Points
12 years ago

Take the moment about centre of mass of system. since the COM doesnot change,net moment abt it is zero

COM is at l/4 from A and l/3 from B

let N1 and N2 be normal reactions

then, N1*l/4 = N2*l/3

N1/N2 = 4/3

option C

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regards

Ramesh

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