Question
Explain how Newton’s first law of motion is a special case of second law?
Solution
According to Newton’s second law,
F = ma
Since, mass of a body cannot be zero therefore, when when force is equal to zero, acceleration is also zero. So, there wont be any change in the velocity of the body.
So, in the absence of any external force, a body will continue to remain in its state of rest or of uniform motion in a straight line. This is Newton’s first law of motion.
So, Newton’s first law of motion is contained in the second law.
