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A-stone-of-mass-100g-is-tied-to-the-end-of-a-string-of-50-cm-long-The-stone-is-whirled-as-a-conical-pendulum-so-that-it-rotates-in-horizontal-circle-radius-30-cm-Determine-the-angular-speed-and-the




Question Number 14677 by tawa tawa last updated on 03/Jun/17
A stone of mass 100g is tied to the end of a string of 50 cm long . The stone is  whirled as a conical pendulum so that it rotates in horizontal circle radius  30 cm. Determine the angular speed and the tension in the string.
Astoneofmass100gistiedtotheendofastringof50cmlong.Thestoneiswhirledasaconicalpendulumsothatitrotatesinhorizontalcircleradius30cm.Determinetheangularspeedandthetensioninthestring.
Answered by ajfour last updated on 03/Jun/17
  height of cone generated  is h=(√(l^2 −r^2 )) =(√((50)^2 −(30)^2 )) cm          = 40cm     tan θ=(r/h)=(3/4)  ;   sin θ =(3/5)             Tsin θ=mω^2 r              Tsin θ=mg  ⇒        tan θ=((ω^2 r)/g)  or      ω = (√((gtan θ)/r))  =(√((10×3)/(4(0.30))))                 = 5rad/s     T=((mg)/(sin θ))=((0.1×10)/((3/5))) =(5/3)N=1.67N.
heightofconegeneratedish=l2r2=(50)2(30)2cm=40cmtanθ=rh=34;sinθ=35Tsinθ=mω2rTsinθ=mgtanθ=ω2rgorω=gtanθr=10×34(0.30)=5rad/sT=mgsinθ=0.1×10(3/5)=53N=1.67N.
Commented by ajfour last updated on 03/Jun/17
Commented by tawa tawa last updated on 03/Jun/17
I really appreciate your effort sir. God bless you sir.
Ireallyappreciateyoureffortsir.Godblessyousir.

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