Question

1. which of the following is a true statement regarding newtons first law?

clear all
an object at rest is at a constant speed.
an object may only change its own state of motion, outside forces have no effect.
any force may result in an acceleration, regardless of the sum of the forces on that object.
an object at rest has no motion until an unbalanced force acts on it.

Explanation:

Newton's First Law states that an object at rest stays at rest and an object in motion stays in motion with the same speed and in the same direction unless acted upon by an unbalanced force.

• The first option is incorrect because an object at rest has a speed of \(0\), not a constant non - zero speed.
• The second option is incorrect because an object cannot change its own state of motion; a force (external) is required.
• The third option is incorrect because only unbalanced forces result in acceleration. If the sum of forces (net force) on an object is zero, there is no acceleration.
• The fourth option is correct as it aligns with Newton's First Law.

Answer:

An object at rest has no motion until an unbalanced force acts on it.