The formula for kinetic energy (KE) is given by:
\[ KE = \frac{1}{2} m v^2 \]
where \( m \) is the mass in kilograms and \( v \) is the velocity in meters per second.
Given:
- Mass \( m = 56 \) kg
- Velocity \( v = 11 \) m/s
Now, let's plug the values into the formula:
\[ KE = \frac{1}{2} \times 56 , \text{kg} \times (11 , \text{m/s})^2 \]
Calculating \( (11 , \text{m/s})^2 \):
\[ (11 , \text{m/s})^2 = 121 , \text{m}^2/\text{s}^2 \]
Now substituting back:
\[ KE = \frac{1}{2} \times 56 , \text{kg} \times 121 , \text{m}^2/\text{s}^2 \]
\[ KE = 28 \times 121 , \text{kg} \cdot \text{m}^2/\text{s}^2 \]
\[ KE = 3388 , \text{J} \]
Thus, the kinetic energy is 3,388 J.