A baseball is moving at a speed of 2.2\,\dfrac{\text{m}}{\text{s}}2.2 s
m

2, point, 2, start fraction, start text, m, end text, divided by, start text, s, end text, end fraction when it strikes the catcher's glove. The padding of the glove is compressed by 2.4\,\text{mm}2.4mm2, point, 4, start text, m, m, end text before the ball comes to a stop. We want to find the average acceleration of the baseball while it is compressing the glove.
Which kinematic formula would be most useful to solve for the target unknown?