Hi all, I am currently reading 'The Science of Interstellar' by Kip Thorne. Kip says that cooper could navigate around the Gagantua system using Gravitational Slingshots with Intermediate-Mass-Black-Holes. However these interactions would accelerate/decelerate the ranger by up to 22% of the speed of light, in (I assume) a fairly short time (The ranger's orbit is travelling at 33% of the speed of light and miller's planet at 55%). I know that that much acceleration over a short period of time generally means the inhabitants of the ranger will be subjected to very uncomfortable G-forces. However Einstein's general relativity states that Gravity is just an artifact of objects travelling in straight lines through curved space-time, which means no G-forces are experienced during free-fall. Would this property transfer over to Grav. slingshots which would mean no G-forces are experienced? Thanks in advance.