Question

When you are making a sharp turn on a ski, how is torsion induced. Is it because the ski's support is now its edge and the load (the skier) is a certain distance away from the edge.

Answer 1

Torsion or torque ???

Torque is the right word here.

When a skier makes a sharp turn, one edge of ski usually lifts off the ground and one end is on the ground.

Here is a diagram

as we can see, the weight of skier ( denoted by a ball) acts vertically downwards, so the end which is off the ground will try to move closer to the ground due to torque created by the skier about the end which is on the ground.

It will help the skier maintain the balance and will prevent the ski from flying off the ice.