# What is a parallelogram rule in physics?

The parallelogram rule says that if we place two vectors so they have the same initial point, and then complete the vectors into a parallelogram, then the sum of the vectors is the directed diagonal that starts at the same point as the vectors.

## What is the definition of parallelogram law of vector addition?

– Parallelogram law of vector addition states that. if two vectors are considered to be the adjacent sides of a parallelogram, then the resultant of the two vectors is given by the vector that is diagonal passing through the point of contact of two vectors.

## What is the use of parallelogram law?

The parallelogram law of vector addition is used to add two vectors when the vectors that are to be added form the two adjacent sides of a parallelogram by joining the tails of the two vectors. Then, the sum of the two vectors is given by the diagonal of the parallelogram.

## What is parallelogram law of addition class 11?

The parallelogram law of vector addition states that if two vectors are considered to be the two adjacent sides of a parallelogram with their tails meeting at the common point, then the diagonal of the parallelogram originating from the common point will be the resultant vector.

## What is the parallelogram law of vector formula?

Answer : According to the Parallelogram law of vector addition, if two vectors \veca and \vecb represent two sides of a parallelogram in magnitude and direction, then their sum \veca + \vecb = the diagonal of the parallelogram through their common point in magnitude and direction.

## Who discovered parallelogram law?

Newton’s proof of the parallelogram of force Suppose two forces act on a particle at the origin (the “tails” of the vectors) of Figure 1.

## What is the parallelogram law of forces and prove it?

If two forces acting at a point are represented both in magnitude and direction by the two adjacent sides of a parallelogram then their resultant is represented by the diagonal of the parallelogram drawn from the same point.

## What is the difference between Triangle law and parallelogram law?

Triangle law is for two vectors when the second vector deviates from the direction of the first vector. Note here that second vector starts after the first vector. But in parallelogram law, the two vectors start from the same initial point in two different directions.

## Why is it called the parallelogram rule?

The Parallelogram law states that the sum of the squares of the length of the four sides of a parallelogram is equal to the sum of the squares of the length of the two diagonals. In Euclidean geometry, it is necessary that the parallelogram should have equal opposite sides.

## Which is the parallelogram?

A parallelogram is a quadrilateral with two pairs of parallel sides. The opposite sides of a parallelogram are equal in length, and the opposite angles are equal in measure. Also, the interior angles on the same side of the transversal are supplementary. Sum of all the interior angles equals 360 degrees.

## What is the vector sum?

A vector sum is the result of adding two or more vectors together via vector addition. It is denoted using the normal plus sign, i.e., the vector sum of vectors , , and is written .

## What is unit vector physics?

A unit vector is one whose magnitude is equal to one. The “cap” symbol(^) is used to indicate unit vectors. Unit vectors have a length of one. It is commonly used to describe a vector’s direction. For example, a unit vector for vector A , is described as A ⏞ = 1 | A | A → .

## What is the formula of vector addition?

This is the formula for the addition of vectors: Given two vectors a = (a1, a2) and b = (b1, b2), then the vector sum is, M = (a1 + b1, a2 + b2) = (Mx, My).

## What is the definition of zero vector?

Definition of zero vector : a vector which is of zero length and all of whose components are zero.

## How do you prove a parallelogram law of vector addition?

Let OACB be the parallelogram. Let P & Q be the two vectors in the adjacent sides OA, OB respectively of the parallelogram. Let R be the resultant vector passing through the diagonal OC. Construct a perpendicular CD to the extended OA.

## Who is the father of vector?

In their modern form, vectors appeared late in the 19th century when Josiah Willard Gibbs and Oliver Heaviside (of the United States and Britain, respectively) independently developed vector analysis to express the new laws of electromagnetism discovered by the Scottish physicist James Clerk Maxwell.

## What is force equilibrium?

If the size and direction of the forces acting on an object are exactly balanced, then there is no net force acting on the object and the object is said to be in equilibrium.

## What is parallelogram low of forces?

It states that if two concurrent forces, acting simultaneously on a body be represented in magnitude and direction by the two sides of a parallelogram then their resultant may be represented in magnitude and direction by the diagonal of the parallelogram, drawn from the same point.

## What is law of polygon of forces?

The Law of Polygon of Forces states that – if any number of coplanar concurrent forces can be represented in magnitude and direction by the sides of a polygon taken in order; then their resultant will be represented by the closing side of the polygon taken in opposite order”.

## What are the laws of moment?

Law of moments : In equilibrium sum of anticlockwise moments is equal to sum of clock-wise moments.

## What is the triangle law?

Triangle law of vector addition states that when two vectors are represented as two sides of the triangle with the order of magnitude and direction, then the third side of the triangle represents the magnitude and direction of the resultant vector.

## What is triangle law force?

Triangle Law of Forces It states, “If two forces acting simultaneously on a particle, be represented in magnitude and direction by the two sides of a triangle, taken in order; their resultant may be represented in magnitude and direction by the third side of the triangle, taken in opposite order.”