Physics of Lifting the Ball
The technique for lifting a field hockey ball is a lot like catapulting the ball into the air. The stick is placed underneath the ball, while your hands simultaneously push the stick up and down, making the ball fly through the air. The force that your top hand puts on the stick is transfered to the ball, sending it upward into projectile motion. The more force being put on your stick from your arms, the ball overcomes gravity more. For extra force, along with the pushing and pulling motions of the arms, the legs can be added. For maximum force on a lift, your legs should be bent at the knee, and your arm should be bent. There are rules in field hockey preventing you from lifting the ball a certain height when people are near, so a field hockey player should always be conscious of how much force they are exerting on their lift.