Final answer:
To find the magnitude of the impulse on Henri Lamothe when belly-flopping from 10 meters into 34 cm of water, calculate his velocity upon entering the water using gravitational acceleration and then multiply by his mass to find the impulse.
Step-by-step explanation:
The magnitude of the impulse on Henri Lamothe when he belly-flopped into a shallow pool of water from a height of 10 meters can be calculated using principles from physics. Impulse is given by the change in momentum, and momentum is the product of mass and velocity. To find the impulse, we must first calculate the velocity with which he hits the water using the formula for gravitational acceleration, v = √(2gh), where g is the acceleration due to gravity and h is the height. Once the velocity is determined, the impulse can be found by multiplying his mass by the velocity, since he stops upon hitting the water, which means the final velocity is zero.