the force applied at the handle of the strict lever causes thelever to revolve clockwise about the pen B v an angle of 2degrees. Determine the mean normal strain emerged in eachwire. The wires space unstretched once the bar is in the horizontalposition. Please display work.

You are watching: The force applied at the handle of the rigid lever the force applied at the manage of the rigid lever reasons the bar to rotate clockwise about the pin B v an edge of 2 degrees. Determine the typical normal strain arisen in every wire. The wires space unstretched when the lever is in the horizontal position. Please display work.

Angular displacement: that the as the angle through which an object moves top top a one path. It is the angle, in radians, between the initial and also final positions.

Strain: The change in measurement over the original measurement caused due to the used load is dubbed strain.

Strain is the ratio of adjust in length over the initial length.

ε=δL\\varepsilon = \\frac\\delta Lε=Lδ​

The relation for angular displacement is,

δ=Lθ\\delta = L\\theta δ=Lθ

Calculate the displacement of point A.

δA=LABθ\\delta _A = L_AB\\theta δA​=LAB​θ

Here size of lever abdominal is LABL_ABLAB​ and angle that tilt about the pen B is θ\\theta θ .

δA=(200×0.03491)=6.9813mm\\beginarrayl\\\\\\delta _A = \\left( 200 \\times 0.03491 \\right)\\\\\\\\\\;\\;\\;\\; = 6.9813\\;\\rmmm\\\\\\endarrayδA​=(200×0.03491)=6.9813mm​

Calculate the displacement of suggest C.

δC=LBCθ\\delta _C = L_BC\\theta δC​=LBC​θ

Here size of bar BC is LBCL_BCLBC​ and also angle of tilt around the pen B is θ\\theta θ .

δC=(300×0.03491)=10.4720mm\\beginarrayl\\\\\\delta _C = \\left( 300 \\times 0.03491 \\right)\\\\\\\\\\;\\;\\;\\; = 10.4720\\;\\rmmm\\\\\\endarrayδC​=(300×0.03491)=10.4720mm​

Calculate the displacement of suggest D.

δD=LBDθ\\delta _D = L_BD\\theta δD​=LBD​θ

Here length of lever BD is LBDL_BDLBD​ and also angle the tilt around the pin B is θ\\theta θ

δD=(500×0.03491)=17.4533mm\\beginarrayl\\\\\\delta _D = \\left( 500 \\times 0.03491 \\right)\\\\\\\\\\;\\;\\;\\; = 17.4533\\;\\rmmm\\\\\\endarrayδD​=(500×0.03491)=17.4533mm​

Calculate the typical normal strain occurred in cable AH.

(∈avg)AH=δALAH\\left( \\in _avg \\right)_AH = \\frac\\delta _AL_AH(∈avg​)AH​=LAH​δA​​

Here displacement of allude A of the lever is δA\\delta _AδA​ , unstretched length of the cable AH is LAHL_AHLAH​ .

Substitute 6.9813mm6.9813\\;\\rmmm6.9813mm because that δA\\delta _AδA​ , 200mm200\\rm mm200mm because that LAHL_AHLAH​ in relation,

(∈avg)AH=6.9813200=0.0349\\beginarrayl\\\\\\left( \\in _avg \\right)_AH\\; = \\frac6.9813200\\\\\\\\\\;\\;\\;\\;\\;\\;\\;\\;\\;\\;\\;\\;\\; = 0.0349\\\\\\endarray(∈avg​)AH​=2006.9813​=0.0349​

Calculate the mean normal strain developed in wire CG.

(∈avg)CG=δCLCG\\left( \\in _avg \\right)_CG = \\frac\\delta _CL_CG(∈avg​)CG​=LCG​δC​​

Here displacement of suggest C that the bar is δC\\delta _CδC​ , unstretched length of the wire CG is LCGL_CGLCG​

Substitute 10.4720mm10.4720\\;\\rmmm10.4720mm for δC\\delta _CδC​ and 300mm300\\rm mm300mm because that LCGL_CGLCG​ in relation,

(∈avg)CG=10.4720300=0.0349\\beginarrayl\\\\\\left( \\in _avg \\right)_CG\\; = \\frac10.4720300\\\\\\\\\\;\\;\\;\\;\\;\\;\\;\\;\\;\\;\\;\\;\\; = 0.0349\\\\\\endarray(∈avg​)CG​=30010.4720​=0.0349​

Calculate the median normal strain emerged in wire DF.

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(∈avg)DF=δDLDF\\left( \\in _avg \\right)_DF = \\frac\\delta _DL_DF(∈avg​)DF​=LDF​δD​​

Here displacement of suggest D of the lever is δD\\delta _DδD​ , unstretched size of the wire DF is LDFL_DFLDF​ .

Substitute, 17.4533mm17.4533\\;\\rmmm17.4533mm because that δD\\delta _DδD​ and also 300mm300\\rm mm300mm for LDFL_DFLDF​ in relation,

(∈avg)DF=17.4533300=0.0582\\beginarrayl\\\\\\left( \\in _avg \\right)_DF = \\frac17.4533300\\\\\\\\\\;\\;\\;\\;\\;\\;\\;\\;\\;\\;\\;\\;\\; = 0.0582\\\\\\endarray(∈avg​)DF​=30017.4533​=0.0582​

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