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Newton's First Law of Motion is often called the Law of Inertia. This law tells us that an object at rest stays at rest, and an object in motion continues to move at a constant speed and in a straight line, unless acted upon by an unbalanced force. In simpler terms, things don’t change what they’re doing unless something forces them to change.
When you turn off a ceiling fan, it doesn’t stop turning immediately. This is because of inertia. The fan blades have been set in motion and they want to keep moving. This is why they continue to spin even though the power is off.
Without inertia, the fan would simply stop as soon as the power was cut off, but that’s not what happens due to the principles defined by this law.

Friction is a force that opposes motion. It acts between surfaces that touch each other. When it comes to a ceiling fan, friction plays an important role in eventually bringing the spinning blades to a halt.
There are two main types of friction acting on the fan:

• Air Resistance: This is the friction between the fan blades and air particles. As the fan blades move, they push against the air, which pushes back against them. This slows them down over time.
• Mechanical Friction: This occurs within the fan motor. Parts rubbing against each other create resistance, further working to slow the fan down until it stops.

Even though friction slows down the fan, it is a very gradual process. This is why the fan doesn’t stop immediately but slowly loses its speed until it stands still.

Motion refers to the change in position of an object over time. When you switch on a ceiling fan, you give it energy to start moving. The electric power causes the fan's motor to rotate, creating motion in the fan blades.
Once the fan blades are in motion, they will keep going as long as energy is supplied.
When power is cut off, the motion doesn't stop right away due to inertia, as discussed earlier. Instead, the fan continues to move until forces like friction gradually take away its motion energy.
Motion is a fundamental concept that explains how the fan goes from stillness to spinning and back to rest again.