amritha_sish said:
Weight refers to the force of gravity acting on an object, while mass is a measure of the amount of matter in an object. In other words, weight is dependent on the gravitational pull of a particular planet or body, while mass remains constant regardless of location.
The force of gravity between two objects is calculated using the equation F = G * (m1 * m2)/d^2, where G is the universal gravitational constant, m1 and m2 are the masses of the two objects, and d is the distance between them.
Upthrust, also known as buoyant force, is the upward force exerted by a fluid on an object immersed in it. It is equal to the weight of the fluid displaced by the object. This force is what allows objects to float in a fluid.
The density of an object plays a crucial role in determining its buoyancy. Objects with a higher density than the fluid they are immersed in will sink, while objects with a lower density will float. This is because the buoyant force is greater than the weight of the object in the latter case.
Archimedes' Principle states that the buoyant force acting on an object is equal to the weight of the fluid it displaces. This principle is used to explain why objects float or sink in a fluid and is the basis for calculating buoyancy. It also explains why objects feel lighter when immersed in a fluid, as the buoyant force counteracts the force of gravity.