An object floats when its weight equals the:

**The reasoning** When you place an object in water, two main forces act on it: its **weight** (pulling downward) and **upthrust** (pushing upward). Upthrust is the buoyant force from the fluid trying to push the object up. For an object to **float** — meaning it stays at the surface without sinking or rising — these two forces must **balance**. This is **Archimedes' Principle** in action: **Weight of object = Upthrust from fluid** When they're equal, the object is in equilibrium and floats peacefully. If weight > upthrust, it sinks. If upthrust > weight, it rises (like a balloon underwater). **Why the wrong options tempt you** - **D) Gravity** — Tricky! Gravity *causes* weight, but weight is the force we're comparing to upthrust, not gravity itself. They're testing if you know the difference. - **A) Friction** — Friction acts between surfaces sliding past each other, not relevant for floating. - **C) Tension** — That's the force in ropes or strings, nothing to do with buoyancy. **Quick takeaway** *An object floats when the upward push from water (upthrust) perfectly balances its downward pull (weight).*