Question: Which of the following statements is true according to Newton\'s first law?

Options:

1. An object at rest stays at rest unless acted upon by a net force.
2. Force equals mass times acceleration.
3. For every action, there is an equal and opposite reaction.
4. Energy cannot be created or destroyed.

Correct Answer: An object at rest stays at rest unless acted upon by a net force.

Solution:

Newton\'s first law states that an object at rest stays at rest and an object in motion stays in motion unless acted upon by a net force.