Interactive Simulation
Object Mass
5 kg
Light (1 kg)
Heavy (20 kg)
Applied Force
30 N
Weak (10 N)
Strong (100 N)
F = m × a (Newton's Second Law)
Velocity
0.00 m/s
Acceleration
0.00 m/s²
Momentum
0.00 kg·m/s
Try this: Apply 50N force to 1kg object, then same force to 20kg object. See the difference!
Physics Theory
What is Mass?
Mass is the amount of matter in an object. More mass = more matter.
What is Inertia?
Inertia is an object's resistance to changes in motion.
• Objects at rest stay at rest
• Objects in motion stay in motion
The Key Relationship
Mass and inertia are directly proportional:
Double the mass = Double the inertia
Newton's Second Law
The mathematical relationship:
F = m × a
Where:
- F = Force (Newtons)
- m = Mass (kilograms)
- a = Acceleration (m/s²)
This means: For the same force, heavier objects accelerate less.
| Mass | Inertia | Example |
|---|---|---|
| 1 kg | Low | Soccer ball |
| 5 kg | Medium | Textbook |
| 20 kg | High | Suitcase |