Question

Newton's second law is a major part of mechanics. However, it does have its limitations. Under what condition does the second law not apply. Explain when this would happen.

Answer 1

Newton's second law of motion does not apply under extreme relativistic speeds and when dealing with microscopic objects in the realm of quantum mechanics.

Step-by-step explanation:

Newton's second law of motion states that the acceleration of an object is directly proportional to the net force acting on it and inversely proportional to its mass.

However, there are certain conditions where the second law does not apply. One such condition is when an object is subject to extreme speeds or accelerations close to the speed of light. At such high speeds, relativistic effects come into play and the simple relationship between force, mass, and acceleration described by Newton's second law breaks down.

Another condition where the second law may not apply is when dealing with microscopic objects, such as atoms or subatomic particles. In these cases, quantum mechanics takes precedence over classical mechanics, causing the second law to become less applicable.

Answer 2

Newton's second law only applies in an inertial frame of reference.

Step-by-step explanation:

An inertial frame of reference is not accelerating. An observer on the ground is in an inertial frame of reference. He can use Newtons laws to describe a rocket launch. The person inside the rocket is not in an inertial frame of reference when the rocket is launched. Newtons laws can not be used by the person inside the rocket.