Video narration
Weight tells you how strongly gravity pulls on an object. To calculate it, use the formula: Weight equals Mass times Gravity. In symbols: W = m × g. Here, m is mass, measured in kilograms, and g is the strength of gravity, measured in meters per second squared. On Earth, g is about 9.8 m/s². Let’s do a quick example. If an object has a mass of 10 kg, then its weight is W = 10 × 9.8. Multiply those numbers and you get 98. The unit for weight is the Newton, so the object’s weight is 98 N. Remember: mass and weight are not the same. Mass is how much matter an object has and stays the same, but weight depends on gravity, so it can change from place to place.