Question

The relation $\overrightarrow{F} = m\overrightarrow{a},$ cannot be deduced from Newton’s second law, if :

• A. Force depends on time
• B. Momentum depends on time
• C. Acceleration depends on time
• D. Mass depends on time

Answer 1

Answer: (D)

Mass depends on time

Answer 2

The relation $\overset{\rightarrow}{F} = m\overset{\rightarrow}{a}$ can only be deduced from Newton’s second law, if mass remains constant with time. If mass depends on time then this relation cannot be deduced