yes,it is due to the fact that that the capsule had an acceleration towards left.so, a force (psuedo) was experienced by the observer.
similar, situation when a man is in a lift accelerating downwards ,then he feels a weightlessness.
the centripetal (center seeking) acceleration is what you feel when you round a curve and you're thrown outward. it is always inward or perpendicular to the curve.
you are not able to see about
the outside w...