Defn betn mass & weight
Answers
Explanation:
scientific contexts, mass is the amount of "matter" in an object (though "matter" may be difficult to define), whereas weight is the force exerted on an object by gravity. ... Objects on the surface of the Earth have weight, although sometimes the weight is difficult to measure.
..follow mw...
MASS:
Mass is a scientific measure of the amount of matter an object is made up of. No matter where you are at given moment in time, mass is constant. So, whether you're walking to the shop to stock up on groceries or bouncing around on the moon, your mass is the same. Obviously, if you're on a diet that's not the answer you want to hear but don't panic - we'll get to the all-important definition of weight shortly.
Some other key points about mass:
Mass is indestructible. As you've seen above, no matter where you are in the universe your mass will never change
Mass can never be zero. What we mean by this is that everything in the universe has mass. If it didn't it simply wouldn't exist.
WEIGHT:
Weight is a pretty important measure not only to dieters the world over but also to the scientists and egg heads who design things like space shuttles and boats - the opposite end of the spectrum, but it's all about perspective.
But how can weight vary whilst mass has to remain constant? It's fairly simple: weight is a variable i.e. it can change based on the amount of gravitational pull an object exerts on a body. Scientists have defined weight using this equation:
Formula: Weight (W) = Mass (M) multiplied by gravitational acceleration (g). (W = mg)
Some key points about weight:
The weight of an object changes based on where it is. If you've decided to visit the moon to test out this theory then you'll find that, in a matter of hours, you will have slashed your weight by two thirds (in your face, Slimming World!)
Weight is a vector (a quantity that is fully described by both a magnitude and a direction) and its direction of pull is towards the centre of the planet you're stood on. What? Sorry, I did promise layman's terms: gravity, which is created by the mass of an object, moves towards the centre of the object and it is gravity that determines your, or any other object's, weight.