2-1 What is the relationship between mass and weight?
2-2 What is gravity like on other planets compared to Earth?
Vocabulary
gram mass newton weight
Concepts
• Gravity is an attractive force between two objects.
• Mass is the amount of matter in an object.
• Weight is the force of gravity on an object.
• The acceleration of an object increases if the force acting on it increases (F = ma).
• If identical force is applied to two objects with different masses, the more massive object will accelerate less than the less massive object (F = ma).
