You're asking about acceleration, but the information provided is a bit unclear. Here's why:

* Acceleration is a change in velocity over time. You need to know how long it takes to change the velocity to calculate the force.

* 3m is a distance, not an acceleration. Acceleration is measured in meters per second squared (m/s²).

To help you understand, let's assume you meant to ask:

"How much force is required to accelerate a 2kg mass at 3m/s²?"

Here's how to solve this:

Newton's Second Law of Motion:

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

Applying the information:

* Mass (m) = 2 kg

* Acceleration (a) = 3 m/s²

Calculation:

* Force (F) = 2 kg * 3 m/s² = 6 Newtons (N)

Therefore, you would need a force of 6 Newtons to accelerate a 2kg mass at 3 m/s².