- If the object is in equilibrium, the sum of all the forces acting on the object is zero.
- Inertia
- Force
- Mechanical Equilibrium
- Equilibrium rule

- A push or a pull on an object.
- Inertia
- Force
- Mechanical Equilibrium
- Equilibrium rule

- The tendency of objects to resist changes in motion.
- Inertia
- Force
- Mechanical Equilibrium
- Equilibrium rule

- An object is in a state where there is no change in motion.
- Inertia
- Force
- Mechanical Equilibrium
- Equilibrium rule

- How fast an object is moving, and in what direction.
- Speed
- Velocity
- Acceleration
- Free fall

- How fast an object is moving, without consideration of direction.
- Speed
- Velocity
- Acceleration
- Free fall

- An object is falling under the influence of gravity, and with no air-resistance.
- Speed
- Velocity
- Acceleration
- Free fall

- The rate at which velocity is changing with time.
- Speed
- Velocity
- Acceleration
- Free fall

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Physics Teachers with more than 15 years of teaching Physics to students up to Plus Two