Equilibrium Physics Example 1

Follow the full solution, then compare it with the other examples linked below.

easy

25 \text{ N}

lamp hangs from a single vertical cord. What is the tension in the cord?

1
The lamp is in static equilibrium, meaning the net force on it is zero: $\sum F = 0$ .
2
Identify the forces: tension $T$ acts upward, weight $W = 25 \text{ N}$ acts downward.
3
Set net force to zero and solve: $T - W = 0 \implies T = 25 \text{ N}$

Answer

T = 25 \text{ N}

An object in equilibrium has zero net force. For a hanging object, the tension in the supporting cord equals the object's weight.

About Equilibrium

A state in which all forces acting on an object balance so that the net force equals zero and there is no acceleration.

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