Physics
Physics
Problem
Which of the following best defines the weight of a body? a) Reaction force exerted by a surface on the body b) Force with which Earth attracts the body toward its centre c) Quantity of matter contained in the body d) Measure of the body’s resistance to accelerationIntuitive explanation
Weight is the gravitational force that Earth (or another body) exerts on an object—not the amount of matter in it. The key insight is that weight changes depending on where you are (stronger gravity on Earth's surface, weaker on the Moon), while mass stays constant. To find weight, multiply mass by the local gravitational acceleration: .
Intuitive explanation
Weight is the gravitational force that Earth (or another body) exerts on an object—not the amount of matter in it. The key insight is that weight changes depending on where you are (stronger gravity on Earth's surface, weaker on the Moon), while mass stays constant. To find weight, multiply mass by the local gravitational acceleration: .