February 8, 2018 Vectors Posted by Shahzad Ayub Welcome to your Vectors Name If east, west, north, south, up and down are representing the direction of unit vectors, then east x south has direction along down South Up NorthAddition of vector obeys commutative law associative law distributive law All given lawsMaximum number of rectangular components are Two Three InfiniteThe dimension of torque is [ML-2T-2] [ML2T-2] [MLT-2]Angle between two vectors A and B can be determined by their dot product head to tail rule their cross productMaximum number of components of a vector may be Two infinite threeA body in equilibrium may be at rest or in uniform motion always at rest always in uniform motionThe resultant of two forces of equal magnitudes is also equal to the magnitude of the forces. The angle between the two forces is 90 Degree 120 Degree 45 DegreeThe magnitude of cross product is equal to the dot product between them. The angle between the two vectors is 120 Degree 90 Degree 45 DegreeSI unit of torque is Both N.m jouleRectangular coordinate system is also called polar coordinate system Cartesian coordinate system spherical coordinate systemTorque acting on a body determines direction of motion of the body linear acceleration angular accelerationSI unit of torque is joule N.m BothIf A=B, which of the following is not correct? A.B = A^ B^ |A| = |B| |A^| = |B^|The direction of vector product is given by head to tail rule left hand rule right hand rule