JEE Main & Advanced Physics Vectors Question Bank

done Lamis Theorem Total Questions - 5

• question_answer1)
  P, Q and R  are three coplanar forces acting at a point and are in equilibrium. Given P = 1.9318 kg wt, \[\sin {{\theta }_{1}}=\]0.9659, the value of R is ( in kg wt)         [CET 1998]
  A)
                  0.9659 done clear
  B)
                  2 done clear
  C)
                  1 done clear
  D)
                  \[\frac{1}{2}\] done clear
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• question_answer2)
  A body is in equilibrium under the action of three coplanar forces P, Q and R as shown in the figure. Select the correct statement                                           [AFMC 1994]
  A)
                  \[\frac{P}{\sin \alpha }=\frac{Q}{\sin \beta }=\frac{R}{\sin \gamma }\] done clear
  B)
                                  \[\frac{P}{\cos \alpha }=\frac{Q}{\cos \beta }=\frac{R}{\cos \gamma }\] done clear
  C)
                  \[\frac{P}{\tan \alpha }=\frac{Q}{\tan \beta }=\frac{R}{\tan \gamma }\] done clear
  D)
                                  \[\frac{P}{\sin \beta }=\frac{Q}{\sin \gamma }=\frac{R}{\sin \alpha }\] done clear
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• question_answer3)
  If a body is in equilibrium under a set of non-collinear forces, then the minimum number of forces has to be                                                                 [AIIMS 2000]
  A)
                  Four done clear
  B)
                              Three done clear
  C)
                  Two       done clear
  D)
                  Five done clear
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• question_answer4)
  How many minimum number of non-zero vectors in different planes can be added to give zero resultant
  A)
                  2              done clear
  B)
                  3 done clear
  C)
                  4              done clear
  D)
                  5 done clear
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• question_answer5)
  As shown in figure the tension in the horizontal cord is 30 N. The weight W  and tension in the string OA in Newton are                                                 [DPMT 1992]
  A)
                           30\[\sqrt{3},\]30 done clear
  B)
                                  30\[\sqrt{3},\]60 done clear
  C)
                  60\[\sqrt{3},\]30 done clear
  D)
                                  None of these done clear
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