Jules Verne in 1865 suggested sending people to the Moon

Question

by firing a space capsule from a 220-m-long cannon with a
launch speed of 10.97 km/s. What would have been the
unrealistically large acceleration experienced by the space
travelers during launch? Compare your answer with the
free-fall acceleration 9.80 m/s2.

Answer 1

You can do this.

Change 10.97km/s to m/s

Then, Vf^2=2ad solve for a.