Question

1. what is a force in physics? 2. what two qualities does every force have? 3. what did people think about how forces work before galileo? 4. what did galileo discover?

Explanation:

1. A force in physics is a push or pull that causes a change in an object's motion or shape.
2. Forces have magnitude (size) and direction. These are the two - main qualities of a force.
3. Before Galileo, people generally thought that forces were required to keep an object in motion (Aristotelian view), and heavier objects fell faster than lighter ones.
4. Galileo made several important discoveries. He discovered the law of falling bodies (objects of different masses fall with the same acceleration in a vacuum), and he also made contributions to the understanding of inertia.

Answer:

1. A force in physics is a push or pull that can change an object's motion or shape.
2. Every force has magnitude and direction.
3. Before Galileo, people thought forces were needed to keep an object moving and heavier objects fell faster.
4. Galileo discovered the law of falling bodies and contributed to the concept of inertia.