University:
University of Greenwich
Course:
BSC152 | Engineering Physics
Academic year:

2021
Views:

198

Pages:

4
Author:

Jesly V

Parallelogram Law of vector If two vectors can be represented both cis magnitude and direction by the two adjacent sides of a a parallelogram drawn from a a common point, then their resultant resultant is is completely represented by both in magnituda and direction by the diagonal of the parallelogram drawn from that pocist. ANALYTICAL METHOD let two vectors A and B inclined to each other at an angle &. Be represented both in magnitud and direction by the adjacent sudes op and op of the parallelogram OPSQ. OS ONT SN 2 2 (OP + PN) + SN 2 2 (A + B COS) + (Bin) R A²+2 AB COS + B² COS² + B² Sune R A+2AB COS + B² (cos²+ sino). R: A²+ B²+ 2AB COS 2 2 R 2 A² + B² + 2AB COS Direction of the Resultant Let the resultant & makes an angle & with the direction of DOSN, tans ...Thes from right angle SN = OP+ PN Special Cases If the two vecton A and B along the same direction are acting