What happens when we ride a bicycle?

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 Here's a simplified explanation of the paragraph about force and motion on a bicycle:


**Imagine you're riding a bike:**


* When you pedal, you apply a pushing force, making the bike go faster. This is because the pushing force is **unbalanced** compared to other forces acting on the bike.

* But what happens when you stop pedaling? Friction between the wheels and the ground acts in the opposite direction of your movement, slowing you down. This friction is another force, but this time it's **balanced** against the pushing force (which is no longer there).

* Here's the key point: An object keeps moving at a constant speed only when all the forces acting on it are **balanced**. When there's no net force (like when you're coasting with balanced pushing and friction forces), the speed stays the same.

* If you want to speed up (increase velocity), you need to push harder, creating an **unbalanced force** again. This unbalanced force will make you go faster for as long as you keep pushing.

* Now, if you completely stop pedaling (remove the unbalanced force), the friction will eventually slow you down to a stop. But interestingly, for a while after you stop pedaling, the bike will keep moving at a certain speed because of the motion you've already gained. This is the concept of inertia – objects tend to stay in motion unless acted upon by an unbalanced force.


**In short:**


* Unbalanced force = Change in speed or direction

* Balanced forces = Constant speed

* No force = Object eventually stops (due to friction) but maintains its motion for a while initially (inertia)

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