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Kinesiology can be defined as the science that deals with organized system of

information related to motion. It is the study of scientific principles of movement to
learn about motor performances.

7. Discuss the meaning and types of equilibrium.

When all the forces acting on the body are counterbalanced by equal and opposite
forces, so that the sum of the forces equals zero, it is called the state of equilibrium. It
can also be said that equilibrium occurs when the resultant force acting on a point is

zero.

Types of Equilibrium

There are1. Static Equilibrium: Static equilibrium is when the centre of gravity is in a

stable position,e.g.,when one is sitting or performing a handstand in gymnastics.

2. Dynamic Equilibrium: Dynamic equilibrium is a state in which the centre of gravity
is in motion, e.g., when one is running or performing a cartwheel in gymnastics.

8. What is centre of gravity? How is it applied in sports and games?

All individuals and objects have a centre of gravity, which can shift depending on the position

or movement of the individual or object.
"A centre of gravity is an imaginary point (within or outside the body or object) around which
the body or object is balanced.”
It can be said that the centre of gravity is the point at which all of the body/s mass seems to

be located and the point about which an object would balance. The centre of gravity is
continuously changing during movements. It can be either within or outside the body

depending on the shape of the body. It always shifts in the direction of movement. When an
individual stands erect with his/her hands at the sides, the centre of gravity is located at the

level of the hips. The knowledge of centre of gravity is important for sportspersons to better
their skills. For example, basketball player during a jump ball swings both arms forward and

upward that assist in gaining height. Once in the air, the player allows one arm to drop to his
side and tries to get maximum reach with the other arm.