Energetics in Kinesiology

Flashcards covering key concepts from KIN 202, focusing on energics, work, power, efficiency, and motion.

Mechanical Work

The energy transferred to or from an object via the application of force along a displacement.

Work Equation

W = F x d, where F = ma.

Kinetic Energy

The energy an object possesses as a result of its motion, calculated as Ek = ½ mv².

Concentric Contraction

A type of muscle contraction that results in positive work.

Isometric Contraction

A type of muscle contraction where there is no net work done.

Eccentric Contraction

A type of muscle contraction that results in negative work.

Net Work

The total work done by an athlete during an exercise.

Power

The rate at which work is done, measured in Watts (J/s) or kpm/min.

Efficiency

The percentage of energy expenditure devoted to mechanical work.

Economy

The physiological cost of doing a fixed amount of work.

Conservation of Energy

The principle that energy cannot be created or destroyed, only transformed.

Potential Energy

The stored energy of an object due to its position or state.

Displacement

The vector quantity that refers to the change in position of an object.

Inertia

The resistance of an object to any change in its state of motion.

Momentum

The quantity of motion an object has, calculated as p = mv.

Force

An interaction that causes an object to accelerate, measured in Newtons (N).