Question Detail
Question
Newton's second law of motion, when considering a system with variable mass, is correctly expressed as:
Correct Answer
Option B is the correct answer.
Detailed Explanation
The general form of Newton's second law is F = dp/dt = d(mv)/dt. F = ma is a special case valid only when the mass is constant.
Hint
The law states that force is proportional to the time rate of change of linear momentum.