GreenHallAcademy
TestSession~2020 TotalMarks:25
Name:
Class:1styear
Date:07-January-2019
Test:Physics
Chapter:2(VectorsandEquilibrium)
TimeAllowed:50minutes
MultipleChoiceQuestions(MCQ's).
Q1.Encircleortickthecorrectanswer. (1×5=5)
(i).IfR
x
andR
y
botharenegativethenresultantliesinthequadrant:
(a)1st (b)2nd (c)3rd (d)4th
(ii).Maximumnumberofcomponentsofavectormaybe:
(a)one (b)two (c)three (d)infinite
(iii).Themagnitudeofavectorr=3î+6ĵ+2kis:
(a)-1 (b)-7 (c)7 (d)8
(iv).Theresultantoftwoforces3Nand4Nactingparalleltoeachotheris:
(a)7 (b)1 (c)5 (d)4
(v).î.(ĵ×k)isequalto:
(a)k (b)1 (c)Nullvector (d)Zero
Q2.WriteShortanswerstoanyfive(5)questions. (2×5=10)
(i).Defineresultantvectorandcomponentofavector.
(ii).Howavectorissubtractedfrom anothervector?Explainusingdiagram.
(iii).Themagnitudeofthesum oftwovectorsiszero.Whatareconditiontogetthis?
(iv).Differentiatebetweenstaticanddynamicequilibrium.
(v).Stateonlytwoconditionsofequilibrium.
(vi).Thevectorsumofthreevectorsgivesazeroresultant.Whatcanbetheorientationofthevectors.
(vii).FindtheunitvectorofthevectorA=4î+3ĵ.
Note:AttemptanyTwo(2)longquestions. (5×2=10)
Q3.Explainthemethodofvectoradditionbyrectangularcomponents.
Q4.Showthatthethreevectorsî+ĵ+k,2î–3ĵ+k,4î+ĵ–5kandaremutuallyperpendicular.
Q5.Definetorque.Calculatetorqueduetoforceactingonarigidbody.
