Weight
Chapter Name : Gravitation |
Sub Topic Code : 101_09_10_04_01 |
Topic Name : Weight |
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Sub Topic Name : Weight |
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Introduction
Weight is nothing but the earth's gravitational force acting on a body. Thus it depends on acceleration due to gravity and varies from pole to equator.
Pre-Requisites:
Forces, Newton's Laws of motion, Gravity, Mass
Activity:
Measure the weights of persons in your class/home. Then calculate their mass.
Real Life Question:
Weight of an object varies from pole to equator. But mass remains the same. What is the difference between weight and mass?
Key Words / FlashCards
| Key Words | Definitions (pref. in our own words) |
|---|---|
| Weight | = mass x g |
| g | Acceleration due to gravity, g = 9.8ms-1 |
| Mass | Measure of inertia |
Learning aids / Gadgets
| Gadgets | How it can be used |
|---|---|
| Weighing Balance | Used to measure weight of objects |
Real life uses :
Weight is used to measure the quantity of a substance as g is constant on the surface of the earth.
Places to visit :
Visit a doctor’s office/ clinic, observe that they have different weighing scales. Find out how they work.
Practical examples around us
| Examples | Explainations |
|---|---|
| Weighing machines | Weighing machines work on the principle of identifying weight and then determine the mass |
What you learn in Theory:
What is Weight? How do we calculate weight?
What you learn in Practice:
Importance of determining weight and how this principle is used in the applications like weighing balance, spring balance etc to determine the mass from weight.