Final answer:
The weight of a 72-kg person on Earth is calculated using the formula w = mg and is 705.6 newtons.
Step-by-step explanation:
To calculate the weight in newtons of a 72-kg person, we will use the formula for weight, which is the gravitational force exerted on a mass. The formula is w = mg, where w is weight in newtons, m is mass in kilograms, and g is the acceleration due to gravity, which is approximately 9.80 m/s² on Earth.
Applying the formula, we get:
- w = (72 kg)(9.80 m/s²)
- w = 705.6 N
Therefore, the weight of a 72-kg person is 705.6 newtons.