Question

If two vectors are represented by the two sides of a triangle taken in order, then their resultant is

the closing side of the triangle taken in ____________
a) same order
b) reverse order
c) random order
d) all the above​

Answer 1

b) Reverse order

Explanation:

A physical  quantity is called a vector if it requires both magnitude and direction to define itself.

Examples of vector : force , torque , moment.

It is also known as 1st order tensor.

Triangle law of  vector's addition:

According to triangle law of vector addition , Sum of two vectors represented by 2 sides of triangle taken in order is equal to the length og third side of triangle taken in reverse order.

Length of vector defines the magnitude of the physical quantity.

Direction  of the vector is defined by the arrow head.

Let there are two vectors a and b

place a vector horizontal.

join the  head of vector a with  to the tail of vector b.

the resultant is equal to the line joining the tail of vector a and head of vector b with head of vector b coinciding with head of the resultant.