its the hip rotation during your smash. while you flick your rist and hit the birdy your shoulders and hips rotate to the opposite direction.
Pascal's Principe is the rule that when force is applied to a confined fluid the increase in pressure is transmitted equally to all parts of the fluid.Bernoulli's principle is the rule that a stream...
interpret opposing views honestly and in their strongest form.
you can't
A principle is a rule of action or conduct.