Final answer:
To find the weight of John on Earth, convert his mass in pounds to kilograms and then use the equation Weight = Mass × Gravity. John's weight on Earth is approximately 253.62 Newtons.
Step-by-step explanation:
To calculate the weight of John on Earth, we need to use the formula Weight = Mass × Gravity, where gravity is 9.8 m/s² on Earth. The mass should be converted from pounds to kilograms because the standard unit of mass in physics is the kilogram. There are approximately 0.453592 kilograms in a pound. Thus, John's mass is 57.5 pounds × 0.453592 kg/pound = 26.08 kg.
Then, to find the weight, we multiply the mass by the acceleration due to gravity:
Weight = 26.08 kg × 9.8 m/s² = 255.584 Newtons (N).
The closest answer to our calculation is option C) 253.62 N, which is approximately the weight of John on Earth.