# Stopping Force of Irregularly Shaped Object

I have a quick question about the force needed to accelerate/decelerate an irregular object.

Lets say I have a 3D object with the following general shape, This system is in general a gripper (gray) holding a load (yellow) and fixed onto a translating horizontal beam (blue).

I was thinking, to calculate the stopping force of the load and gripper, I just would need to find the center of mass of the load and gripper and apply Newton's Second Law with the expected acceleration/deceleration?

Or does using a center of mass calculation with Newton's Second Law result in a large error from the actual system behavior?

As you said the basic deceleration is $$\alpha =\frac{v_{initial}-v_{final}}{t}=\frac{v}{t}$$