Question

Which statements describe Newton and the law of universal gravitation? Check all that apply.

Newton believed that gravity was a force.
The law of universal gravitation states that gravity is the force that keeps birds in flight.
The law of universal gravitation offers a mathematical explanation for the attraction between the moon and Earth.
Newton was the first to have the idea that gravity is everywhere.
Gravity is measured in masses.

Answer 1

Here are the statements that correctly describe Newton and the law of universal gravitation:

1. **Newton believed that gravity was a force.** (True)
2. **The law of universal gravitation states that gravity is the force that keeps birds in flight.** (False - the law describes the gravitational attraction between masses, such as Earth and objects, not specifically birds.)
3. **The law of universal gravitation offers a mathematical explanation for the attraction between the moon and Earth.** (True)
4. **Newton was the first to have the idea that gravity is everywhere.** (True in the sense that he formulated the law of universal gravitation extensively, but the concept of gravity existed before him.)
5. **Gravity is measured in masses.** (False - gravity is a force measured in newtons; mass is measured in kilograms.)

So, the correct statements are 1, 3, and 4.