What causes the myosin ii head to move to the cocked position?

The enzyme at the binding site on myosin is called ATPase. The energy released during ATP hydrolysis changes the angle of the myosin head into a “cocked” position. The myosin head is then in a position for further movement, possessing potential energy, but ADP and Pi are still attached.

We’re learning about a frog of the cicybvdh system s idk but it is mammal