Forces Involved
* Gravity (Weight): This is the force pulling the yo-yo downwards. Its magnitude is equal to the yo-yo's mass (m) multiplied by the acceleration due to gravity (g), represented as "mg."
* Tension (T): This is the upward force exerted by the string on the yo-yo. It counteracts gravity and keeps the yo-yo from falling.
Equilibrium
Since the yo-yo is motionless, we know the forces are balanced. This means:
* Tension (T) = Gravity (mg)
Important Note: While the forces on the string are equal in magnitude, they are acting in opposite directions. The string is being pulled down by the yo-yo's weight and pulled upwards by the tension.
Visualizing it:
Imagine the yo-yo as a single point.
* An arrow pointing downwards represents the force of gravity (mg).
* An arrow pointing upwards represents the tension (T) in the string.
These two arrows would be equal in length, indicating that the forces are balanced.
