Discussion
Among the following the INCORRECT statement is
Answer: C
The incorrect statement is Newton's second law is inconsistent with Newton's first law.
The second law, \(\vec{F} = \frac{d\vec{p}}{dt}\), contains the first: when the net external force is zero, momentum does not change, so a body stays at rest or in uniform motion. The two laws are consistent.
The other statements are correct. The second law relates net external force to acceleration. Impulse equals change in momentum. Since \(\Delta p = F\Delta t\), the same force for the same time gives the same change in momentum whatever the body's mass. Action and reaction act on different bodies, which is why they do not cancel.
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