To find the magnitude of the force of gravity on the sled, we can use the formula for weight, which is given by:
\[ F_{gravity} = m \cdot g \]
where:
- \( F_{gravity} \) is the force of gravity (weight),
- \( m \) is the mass of the sled, and
- \( g \) is the acceleration due to gravity.
The mass of the sled \( m \) is given as 38 kg, and the standard acceleration due to gravity \( g \) is approximately \( 9.81 , \text{m/s}^2 \).
Now, substituting the values into the equation gives:
\[ F_{gravity} = 38 , \text{kg} \cdot 9.81 , \text{m/s}^2 \]
Calculating that:
\[ F_{gravity} = 372.78 , \text{N} \]
Therefore, the magnitude of the force of gravity on the sled is approximately 373 N (when rounded to three significant figures).