If i have a guy standing still with a mass of 50 kg, what is the force exerted if he is on earth?

To find the force exerted by a person standing still on Earth, we can use Newton's second law, specifically the equation for weight:

\[ F = m \times g \]

where:
- \( F \) is the force (weight) in newtons (N),
- \( m \) is the mass in kilograms (kg),
- \( g \) is the acceleration due to gravity, which on Earth is approximately \( 9.8 \, \text{m/s}^2 \).

Given:
- \( m = 50 \, \text{kg} \)
- \( g = 9.8 \, \text{m/s}^2 \)

So,

\[ F = 50 \, \text{kg} \times 9.8 \, \text{m/s}^2 = 490 \, \text{N} \]

The force exerted by the person is 490 newtons.

Would you like more details or have any questions? Here are some related questions:

1. What would the force be if the person were on the Moon?
2. How does the force change if the person's mass increases?
3. What happens to the force if gravity is different?
4. How would you calculate the force if the person were accelerating?
5. Can you explain the difference between mass and weight?

**Tip:** Remember that weight is a force that depends on both mass and the local acceleration due to gravity.

Learn how to calculate the force exerted by a person with a mass of 50 kg standing still on Earth using Newton's second law. Detailed step-by-step solution provided. Suitable for Grades 7-9.

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