Фрагмент из книги.
The pull of gravity on an object gives an object its weight. An object’s weight depends on where it is. When the pull of gravity is weaker, the object’s weight is less. For example, the moon has less gravity than Earth. So, you weigh less on the moon. The pull of gravity is also less the farther you are from Earth’s center. So, you weigh less on a mountaintop than in a valley.








