Newton's Laws of Motion - Physics 101 / AP Physics 1 Review - Dianna Cowern

Pardon the rookie question,  but the graph you draw at 8 minutes and 50 seconds...is that why we cannot accelerate something ( like a spacecraft ) to the speed of light or even near it ,  as its mass would be increasing far too much and then require an appropriate increase in force ( which I gather is really really really really kinda super hard to do )?