A 150 lb person weighs approximately 667.2 newtons. To understand how this is derived, we need to use the conversion factor between pounds and newtons. The acceleration due to gravity is about 9.81 meters per second squared. The formula to convert pounds to newtons is:
Force (N) = Mass (kg) x Acceleration due to Gravity (m/s²)
First, we convert pounds to kilograms. Since 1 pound is approximately 0.453592 kg, a 150 lb person can be converted as follows:
150 lb x 0.453592 kg/lb ≈ 68.18 kg
Next, we multiply the mass in kilograms by the acceleration due to gravity:
Force = 68.18 kg x 9.81 m/s² ≈ 667.2 N
This means that when considering gravitational force, a person weighing 150 pounds exerts roughly 667.2 newtons of force downwards.