Answer:
To calculate the kinetic energy (Ek) of the swimmer, we can use the formula Ek = mv²/2, where m is the mass of the swimmer and v is the speed at which the swimmer is swimming.
Given:
Mass of the swimmer (m) = 70 kg
Speed of the swimmer (v) = 0.8 m/s
Using the formula, we substitute the values:
Ek = (70 kg)(0.8 m/s)²/2
Simplifying the equation:
Ek = (70 kg)(0.64 m²/s²)/2
Ek = 28.56 kg·m²/s²/2
Ek = 14.28 kg·m²/s²
Therefore, the swimmer has 14.28 joules (J) of kinetic energy.
Explanation:
