Newton's laws — true or false?

Exercise and reference answers

Questions

1. Statement is true

   Yes

   Statement

   A body at rest stays at rest unless acted upon by a net external force.

2. Statement is true

   No

   Statement

   Action and reaction forces act on the same body.

3. Statement is true

   Yes

   Statement

   F = ma holds only when mass is constant.

4. Statement is true

   No

   Statement

   The second law is a special case of the first law.

5. Statement is true

   Yes

   Statement

   Inertia depends on mass, not on velocity.