Answer:
g force is the force exerted on a body in the opposite direction to which said body is accelerating. if you're on a rollercoaster and your going not too fast and you suddenly change direction and accelerate quickly, you get pushed back into your seat. g force gets its name as 1g is the equivilent of the force of gravity on the earths surface. That's why when individuals experience g forces greater than 1 or 2, they experience a heavy, weighty feeling and do indeed for a brief moment weigh heavier.
Sudden Change In Direction