There's a slight error in the question: acceleration is measured in meters per second squared (m/s²), not meters per second (m/s).

To calculate the force required, we'll use Newton's Second Law of Motion:

Force (F) = Mass (m) x Acceleration (a)

Here's how to solve it:

* Mass (m) = 15 kg

* Acceleration (a) = 8 m/s²

Force (F) = 15 kg x 8 m/s² = 120 Newtons (N)

Therefore, a force of 120 Newtons is required to accelerate a 15 kg body at 8 m/s².