Question

if a body is taken from place to place what will be change;mass or weight

Answer 1

Weight is the way we usually describe what the scales tell us, but our weight is actually something different.

"When you get on the scale and it tells you that you weigh 50 kilograms, that isn't your weight. That's actually your mass", says Dr Nicole Bell from the University of Melbourne.

"In everyday speech weight and mass are used interchangeably, but weight is a figure arrived at by multiplying mass by gravitational acceleration".

Physicists use Newton's 2nd law (F = ma) to describe the forces acting upon an object moving through space, where force is equal to mass times acceleration.

"In the case of weight, we can describe the force as W = mg", says Bell. "That is weight is equal to mass times gravitational acceleration.

Weight is not measured in kilograms, but in Newtons.

"For example the gravitational acceleration for everyone standing on Earth is 9.8 metres per second squared. If my mass is 50 kilograms and I'm standing on the surface of the Earth, I multiply it by 9.8 and my weight is 490 Newtons," explains Bell.