# What is the parallelogram law in physics?

Definition of

**parallelogram law**. : a**law in physics**: the resultant of two vector quantities represented in magnitude, direction, and sense by two adjacent sides of a**parallelogram**both of which are directed toward or away from their point of intersection is the diagonal of the**parallelogram**through that point.A.

### What is the use of parallelogram method?

**Parallelogram Method**Demonstration. To best understand how the

**parallelogram method**works, lets examine the two vectors below. The vectors have magnitudes of 17 and 28 and the angle between them is 66°. Our goal is to use the

**parallelogram method**to determine the magnitude of the resultant.

#### What is the head to tail method?

**Head**to**Tail method**or graphical**method**is one of the easiest**method**used to find the resultant vector of two of more than two vectors.#### What is meant by magnitude of a vector?

A**Vector**is something that has two and only two defining characteristics.**Magnitude**: the meaning of**magnitude**is 'size' or 'quantity' Direction: the meaning of direction is quite self-explanatory. It simply means that the**vector**is directed from one place to another.#### How do you add two vectors?

To**add**or subtract two**vectors**,**add**or subtract the corresponding components. Let u → = ? u 1 , u 2 ? and v → = ? v 1 , v 2 ? be two**vectors**. The sum of two or more**vectors**is called the resultant. The resultant of two**vectors**can be found using either the parallelogram method or the triangle method .

B.

### What is law of force addition?

The Parallelogram

**Law**for the**Addition**of**Force**Vectors. In order to understand this concept, we must first define a**force**vector. The resultant**force**(or the**force**that can replace the two vectors and still have the same effect of the body as the original two) is the diagonal of the parallelogram (vector "R").#### What is the sum of all the forces acting on an object?

Force is a vector and hence has both a direction and magnitude. For**example**, gravitational force (on earth) acts in downward direction and has a magnitude equal to mass of the object and acceleration due to gravity. The sum of all the forces acting on an object is the net force or resultant force.#### How do balanced forces affect the motion of an object?

A**force**is a push or pull on an**object**.**Balanced forces**acting on an**object**cause no change in the motion of the**object**. When unbalanced**forces**act on an**object**, the sum of the**forces**is not equal to zero. Unbalanced**forces**cause acceleration.#### What a force is?

A**force**can cause an object with mass to change its velocity (which includes to begin moving from a state of rest), i.e., to accelerate.**Force**can also be described intuitively as a push or a pull. A**force**has both magnitude and direction, making it a vector quantity.

C.

### What is Triangle law of addition?

Vector is a quantity which has both magnitude and direction.

**Triangle law**of vector**addition**states that when two vectors are represented by two sides of a**triangle**in magnitude and direction taken in same order then third side of that**triangle**represents in magnitude and direction the resultant of the vectors.#### What are the tensor quantities?

A scalar and a vector are both**tensors**! Scalar =**tensor**of rank 0, vector =**tensor**of rank 1, dyadic =**tensor**of rank 2, etc. A**tensor**is a general**quantity**. A scalar has magnitude with 0 direction, hence a rank 0**tensor**. A vector is a magnitude acting along a line, or 1 dimension, i.e.**tensor**of rank 1.#### What is the definition of a null vector?

Zero**vector**or**null vector**is a**vector**which has zero magnitude and an arbitrary direction. It is represented by . If a**vector**is multiplied by zero, the result is a zero**vector**.#### Is temperature scalar or vector?

Increase/Decrease in**Temperature**- The measurement of the medium's**temperature**is a**scalar**quantity; the measurement of the increase or decrease in the medium's**temperature**is a**vector**quantity. Velocity - The measurement of the rate at which an object changes position is a**vector**quantity.

Updated: 21st November 2019