Physics › Section C · Forces and Newton's laws › Topic C.2
Newton's second law and systems
The first law says a net force changes motion; the second law says by exactly how much. It links force, mass and acceleration in one equation, and it explains why mass and weight are different things.
In this topic
- From the first law to the second
- Systems, internal and external forces
- Newton's second law
- The newton
- Working in components
- Worked example: an electric scooter
- Weight
- Mass versus weight
- Worked example: a drone climbing
- Common mistakes to avoid
- Key takeaways
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