The weight of an adult human in newtons (N) is closest to

• A. 500 N
• B. 100 N
• C. 1000 N
• D. 50 N

Answer: (A)

Weight is the gravitational force on a mass, so W = m g, with g about 9.8 m/s^2. An adult typically has a mass around 50–70 kg, giving a weight roughly in the 490–686 N range. Among the options, 500 N is the closest to that typical weight. The other values would correspond to weights much lower or higher than an average adult (for example, 100 N would be a much lighter person, 1000 N would correspond to a heavier person), so 500 N best matches the common range.