Test: Forces - Year 9 MCQ

According to Newton's third law of motion, if the mass puts a force on the spring, the spring must be putting a force on the mass

Whether an object floats or sinks depends on its density compared to the density of the liquid. If the object is less dense than the liquid, it will float; if it is denser, it will sink.

Archimedes' Principle explains that the buoyant force exerted on an object immersed in a fluid is equal to the weight of the fluid displaced by the object. This principle helps determine whether objects will float or sink in a fluid.

Although steel is more dense than water, a ship made of steel floats because it is designed to displace a large volume of water, creating enough buoyant force to keep it afloat.