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

Correct answers:
- Newton believed that gravity was a force. (Check)
- The law of universal gravitation offers a mathematical explanation for the attraction between the moon and Earth. (Check)

Incorrect:
- The law of universal gravitation states that gravity is the force that keeps birds in flight. (No — birds fly by generating lift that opposes gravity; the law doesn't describe flight.)
- Newton was the first to have the idea that gravity is everywhere. (No — Newton was the first to formulate a universal mathematical law showing the same force governs falling bodies and planetary motion, but others had related ideas earlier.)
- Gravity is measured in masses. (No — gravity is a force measured in newtons; mass is measured in kilograms.)