Mass
* Definition: A fundamental property of matter that measures its resistance to acceleration (inertia).
* Unit: Kilograms (kg)
* Nature: Scalar quantity (has magnitude only, no direction).
* What it tells us: How much "stuff" an object contains.
* Example: A bowling ball has more mass than a feather.
Momentum
* Definition: A measure of an object's motion, taking into account both its mass and velocity.
* Unit: Kilogram meters per second (kg m/s)
* Nature: Vector quantity (has both magnitude and direction).
* What it tells us: How difficult it is to stop a moving object.
* Equation: Momentum (p) = mass (m) x velocity (v)
* Example: A bowling ball rolling down a lane has momentum. A stationary bowling ball has zero momentum.
Key Differences:
* Mass is intrinsic: It's an inherent property of an object and doesn't change unless the object's composition changes.
* Momentum is extrinsic: It depends on both the object's mass and its velocity. A moving object has momentum, but the same object at rest has no momentum.
In Summary:
Think of mass as the "amount of stuff" in an object, while momentum is the "amount of motion" the object has.
A simple analogy:
Imagine two identical cars. They have the same mass. One is parked, the other is moving at a constant speed. The parked car has zero momentum, while the moving car has momentum. The moving car is harder to stop because it has momentum.
