1. Mass:
* Définition: Mass is the amount of matter in an object. It's a fundamental property that doesn't change based on location.
* Unités: Kilograms (kg)
2. Weight:
* Définition: Weight is the force of gravity acting on an object's mass. It's a measure of how strongly gravity pulls on an object.
* Unités: Newtons (N)
* Calculation: Weight (W) =Mass (m) x Acceleration due to gravity (g)
3. Acceleration due to Gravity (g):
* Définition: This is the acceleration experienced by an object due to the force of gravity. On Earth, its value is approximately 9.81 meters per second squared (m/s²).
* Unités: Meters per second squared (m/s²)
Relationship:
* Gravity causes weight: Gravity is the force that pulls objects towards each other. The more massive an object, the stronger its gravitational pull.
* Weight depends on mass and gravity: The weight of an object is directly proportional to its mass. A larger mass experiences a stronger gravitational force and thus has a greater weight. Furthermore, weight is also dependent on the acceleration due to gravity, which varies slightly depending on location.
* Acceleration due to gravity affects freefall: When an object falls freely, it accelerates towards the Earth at a rate of 9.81 m/s² (ignoring air resistance). This acceleration is due to gravity.
en résumé:
* Mass is a fundamental property of an object.
* Weight is the force of gravity acting on an object's mass.
* Acceleration due to gravity is the rate at which an object falls freely under the influence of gravity.
Exemple:
Imagine a 10 kg bowling ball on Earth.
* masse: 10 kg
* Weight: 10 kg x 9.81 m/s² =98.1 N
* Acceleration due to gravity: 9.81 m/s²
If the bowling ball was on the Moon, its mass would still be 10 kg, but its weight would be less because the Moon's gravity is weaker.
