π Understanding Mass vs. Weight
Mass and weight are related but distinct concepts in physics. Mass is a measure of how much 'stuff' is in an object, while weight is the force of gravity acting on that mass. Let's dive deeper!
βοΈ What is Mass?
- βοΈ Mass is a fundamental property of an object that measures its resistance to acceleration. Think of it as how much 'stuff' is there.
- π Mass is measured in kilograms (kg) or grams (g).
- π Mass remains constant regardless of location. Your mass is the same on Earth as it is on the Moon.
- π‘ Mass is a scalar quantity, meaning it only has magnitude (a number) and no direction.
π What is Weight?
- β¬οΈ Weight is the force exerted on an object due to gravity. It's how hard gravity is pulling on an object.
- π’ Weight is calculated using the formula: $W = mg$, where $W$ is weight, $m$ is mass, and $g$ is the acceleration due to gravity.
- π Weight is measured in Newtons (N).
- π Weight varies depending on the gravitational field. Your weight on the Moon is less than your weight on Earth because the Moon's gravity is weaker.
- π§ Weight is a vector quantity, meaning it has both magnitude and direction (downwards, towards the center of the gravitational field).
βοΈ Key Differences Summarized
| Feature |
Mass |
Weight |
| Definition |
Amount of matter in an object |
Force of gravity acting on an object |
| Unit |
Kilogram (kg) |
Newton (N) |
| Measurement |
Measured using a balance |
Measured using a spring scale or weighing scale |
| Variability |
Constant |
Varies with gravity |
| Type |
Scalar |
Vector |