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How to Calculate Mass from Weight

Mass Formula:

\[ mass = \frac{weight}{g} \]

N (Newtons)
m/s²

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1. What is Mass vs Weight?

Mass is a fundamental property of an object that measures its resistance to acceleration (inertia) and is constant regardless of location. Weight is the force exerted on an object due to gravity and varies with location.

2. How Does the Calculator Work?

The calculator uses the formula:

\[ mass = \frac{weight}{g} \]

Where:

Explanation: This formula converts the force of weight into mass by dividing by the gravitational acceleration.

3. Importance of Mass Calculation

Details: Understanding the difference between mass and weight is crucial in physics and engineering. Mass is used in equations of motion, while weight is important for structural design and force calculations.

4. Using the Calculator

Tips: Enter weight in Newtons (1 kg ≈ 9.81 N on Earth) and gravitational acceleration (9.81 m/s² for Earth). The calculator will output mass in kilograms.

5. Frequently Asked Questions (FAQ)

Q1: What's the difference between mass and weight?
A: Mass is an intrinsic property of matter (measured in kg), while weight is the force of gravity acting on that mass (measured in N).

Q2: Why does my weight change on different planets?
A: Your mass stays the same, but weight changes because gravitational acceleration (g) differs on other planets.

Q3: What is standard Earth gravity?
A: Approximately 9.80665 m/s², though it varies slightly by location (9.78 at equator to 9.83 at poles).

Q4: How do I convert kg to Newtons?
A: Multiply mass in kg by gravitational acceleration (9.81 m/s² for Earth).

Q5: Would my mass be different on the Moon?
A: No, mass remains constant. Only your weight would be about 1/6 of your Earth weight due to the Moon's lower gravity.

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