Air bags are designed to deploy 30 cm in 12 ms. how do i estimate the acceleration of the bag?

Question

Express your answer in terms of the acceleration of gravity g.

Answer 1

Assuming constant acceleration, d= 1/2at^2

Using metric .3 = 1/2*a*(.012)^2

Solve for a.

.6 = .000144a

a = 4167m/sec^2

g is 9.8 meters/second^2

4167/9.8

About 425 times the acceleration of Earth's gravity.