Question

What is the weight, in Newton, of an object on mercury with a mass of 90 kilograms?

Answer 1

Hint:The weight of an object is defined as the force of gravity on the object and may be calculated as the mass times the acceleration of gravity \[w = mg\] for an object in free fall, So that gravity is the only force acting on it, then the expression for weight follows from Newton's second law.
Gravity: - Gravity is a natural phenomenon by which all things with mass 4 energy including planets, stars, galaxies and even light one brought towards one another.
On earth gravity gives weight to physical objects and the Moon’s gravity causes the ocean tides.

Complete step-by-step solution
We know that \[Weight = Mass - Acceleration\,due\,to\,gravity\]
At mercury acceleration due to gravity is \[ = 36m/\sec 2\]
Thus, the weight in Newton
\[ = 90kg \times 3.6m/{\sec ^2}\]
\[ = 324\,\]Newton
Weight of \[90kg\]object on earth will weight \[324\] Newton on Mercury

Note: An object that has a mass of 1kg weight about\[9.8\]Newton So if you already known the mass of an object and you want to know its weight in Newton, you simply Multiply the No. of kilogram by \[9.8\] Newton. Conversely if you know the object weight in Newton, you can divide by \[9.8\] Newton and yours get that object’s mass. .