Motion Definition
Motion is the state of an object's movement or rest, changed by external forces. For example, a ball rolls when pushed.
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Newton’s Laws of Motion
Fun Facts
- A kicked ball moves due to a force applied.
- A heavier child on a swing needs more force to reach the same height.
- A rocket moves up when gases push down on Earth with equal force.
Why Do We Need To Know About Motion
Learning about how things move helps us understand everyday life and why some jobs depend on this knowledge. Jobs like engineering need a grasp of how things move and work together to make things we use every day.
This isn’t just school stuff; it has real uses that keep us safe and make our lives easier. For example, engineers who work on making cars safer use the rules of motion to design features that protect us in a crash. These include parts of the car that squish to absorb shock and systems that warn us before we hit something. This helps them figure out how to reduce the impact of a crash and save people’s lives.
Frequently Asked Questions
Check out the Full Lesson on Newton’s Laws of Motion
In this lesson, we learn that:
- Newton's 1st law tells us that an object won't change its motion unless acted upon by a force.
- Newton's 2nd law tells us that heavier objects need a larger force to move them.
- Newton's 3rd law tells us that for every action there is an equal and opposite reaction.
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