Physics Practicals Class 11

# Parallelogram Law of Vector Addition

• Teach science experiments in a gamified way
• Boost conceptual clarity and knowledge retention
• Aligned with National Education Policy 2020
• Helpful in getting NAAC accreditation
• CBSE, ICSE, and state boards aligned curricula
• Engaging simulations with easy-to-teach instructions

• Through the simulation, you will gain a comprehensive understanding of how to determine the mass of an object by utilizing the parallelogram law of vector addition.
• By engaging with the simulation, you can acquire the skills needed to measure the mass of an object by tracing a parallelogram using a geometric compass and marking equilibrium through the balancing of weights on hangers.
• At the conclusion of the simulation, you will learn the functioning of Grave Sand's apparatus.
• You will also grasp the principles behind the parallelogram law of vector addition.

• Additionally, you will develop the ability to determine the mass of an object, trace a parallelogram using a geometric compass, and calculate the resultant of two forces.

### Simulation Details

Duration – 30 Minutes
Easily Accessible
Languages – Odia & English
Platforms – Android & Windows

Description

Grave Sand’s apparatus:
It consists of a wooden board fixed vertically on two wooden pillars. Two pulleys P1 and P2 are provided on its two sides near the upper edge of the board. A thread carrying hangers for addition of slotted weights is made to pass over the pulleys so that two forces P and Q can be applied by adding weights to the hangers. By suspending the given object, whose weight is to be determined, in the middle of the thread, a third force X is applied.

The law states that “when two forces act simultaneously at a point and are represented in magnitude and direction by the two adjacent sides of a parallelogram, then the resultant of forces can be represented both in magnitude and direction by the diagonal of the parallelogram passing through the point of application of the two forces.”

Let P and Q be the magnitudes of the two forces and θ the angle between them. Then the resultant R of P and Q is given by,

### Requirements for this Science Experiment

• Grave Sand’s apparatus
• White paper
• Drawing pins
• Pencil, string
• Wooden block
• Protractor
• Weight hanger
• Slotted weight
• Scale
• Thin mirror strip
• Geometry compass

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