Q.What do you mean by Equilibrium? Explain how Equilibrium increases with the influence of various factors by giving suitable examples from sports.

Equilibrium is a state of balance or stability in which all the forces acting on a body cancel each other out, leaving the body either at rest or moving with constant velocity. When the sum of forces is zero, no change in motion occurs. In sports, maintaining equilibrium is crucial for performance, and several factors influence how stable an athlete remains.

Factors that enhance equilibrium in sports:

• Lower centre of gravity – Bending the knees lowers the centre of gravity and increases stability. Sprinters bend their knees when stopping quickly to avoid toppling forward. A wrestler adopts a half-sitting posture to stay grounded, and a shot-putter bends the knees to maintain balance and avoid a foul.

• Centre of gravity over the base – Stability is greatest when the centre of gravity lies directly above the base of support. On a balance beam, the base is narrow, so a gymnast raises an arm or leg to shift the centre of gravity back over the beam and prevent a fall.

• Wider base of support – Spreading the feet apart or using both hands and feet creates a larger base, which improves stability. A wider stance helps athletes resist being pushed or knocked off balance. …

Equilibrium describes the condition in which a body remains perfectly balanced because the sum of all forces acting on it equals zero. When an athlete is in equilibrium, she either stays at rest or moves with constant velocity — no net force pushes her off course. Think of a gymnast frozen in a handstand or a wrestler holding a defensive stance: both are managing equilibrium by ensuring that gravity, muscle tension, and ground reaction forces all cancel out. The moment one force dominates, balance breaks and the athlete topples or accelerates.

In sport, equilibrium is rarely static. Athletes constantly adjust their posture, shift their weight, and reposition limbs to maintain or regain balance under dynamic conditions. Several physical factors determine how stable that equilibrium is, and coaches drill these principles into technique from day one.

Lower centre of gravity increases stability. The centre of gravity is the point where the body's mass is concentrated. Bringing it closer to the ground makes an athlete harder to topple. A sprinter who has just crossed the finish line bends her knees deeply to stop quickly without falling forward; the lowered centre of gravity anchors her. Similarly, a wrestler adopts a half-sitting crouch during a bout, knees bent and hips low, so an opponent cannot easily lift or throw him. A shot-putter bends his knees at the moment of release to keep his centre of gravity low and avoid stepping over the foul line — the lower stance gives him the stability to absorb the explosive force without losing balance.

Stability increases when the centre of gravity is centred over the base of support. The base of support is the area beneath the body in contact with the ground. If the centre of gravity drifts outside that base, the athlete tips. On a balance beam, the base is only ten centimetres wide, so a gymnast's centre of gravity must stay precisely above it. When she feels herself swaying, she raises an arm or extends a leg to shift her centre of gravity back toward the centre of the beam. That small adjustment — moving mass in one direction — pulls the centre of gravity in the opposite direction, restoring equilibrium.

A wider base of support enhances stability. Spreading the feet apart increases the area over which the body's weight is distributed, making it harder to knock someone over. A judoka in a defensive stance plants her feet shoulder-width or wider, lowering the chance that a throw will succeed. The most comprehensive base comes from using both hands and feet: a wrestler on all fours, or a sprinter in the starting blocks with fingers pressed to the track, enjoys maximum stability because four points of contact create a large, stable polygon. …