To solve this problem, we need to find the acceleration experienced by the boy at the bottom of the roller coaster loop.

Given:

• Mass of the boy, $m = 53 \, \text{kg}$
• Net force experienced by the boy, $F_{\text{net}} = 1800 \, \text{N}$

Formula:

The net force experienced by the boy is related to his mass and acceleration by Newton's second law: $F_{\text{net}} = m \cdot a$ where:

• $F_{\text{net}}$ is the net force,
• $m$ is the mass,
• $a$ is the acceleration.

Solving for acceleration $a$:

$a = \frac{F_{\text{net}}}{m}$

Substituting the values:

$a = \frac{1800 \, \text{N}}{53 \, \text{kg}}$

Now, let's calculate the acceleration.