Question

question 28 of 29
which of the following statements describes the law of inertia?
a. objects remain in the same state of motion unless a force acts on them.
b. the force of friction on an object is proportional to the normal force.
c. net force is equal to mass times acceleration.
d. for every action force there is an equal and opposite reaction force.

Explanation:

The law of inertia, Newton's first - law of motion, states that an object will remain at rest or in uniform motion in a straight line unless acted upon by an external force. Option A describes this law. Option B is related to the friction formula. Option C is Newton's second - law ($F = ma$). Option D is Newton's third - law.

Answer:

A. Objects remain in the same state of motion unless a force acts on them.