Function angular_acceleration_from_torque 

pub fn angular_acceleration_from_torque(
    torque: f64,
    moment_of_inertia: f64,
) -> Option<f64>

Computes angular acceleration from torque using α = τ / I.

Returns None when moment_of_inertia is less than or equal to zero, when any input is not finite, or when the computed angular acceleration is not finite.

For broader torque-specific scalar helpers such as lever-arm and balancing relations, prefer use-torque.