Biomechanics Lecture Notes - Work, Power, and Energy

These flashcards cover key concepts and definitions related to work, power, energy, and their principles in biomechanics.

Work

The product of force and the displacement in the direction of the force, represented by the equation U = Fd.

Positive Work

Occurs when the force acting on an object is in the same direction as the displacement.

Negative Work

Occurs when the force acting on an object is in the opposite direction as the displacement.

Net Work

The overall mechanical work performed on a system or object, taking into account both positive and negative work.

Power

The rate at which work is done, calculated as P = U/t, where U is work and t is time.

Mechanical Energy

Energy that is associated with the motion (kinetic energy) and position (potential energy) of an object.

Kinetic Energy (KE)

The energy an object has due to its motion, calculated by the formula KE = ½ mv².

Potential Energy (PE)

The energy an object has due to its position or condition, including gravitational potential energy and strain potential energy.

Strain Energy

Also known as elastic potential energy, it is energy stored due to deformation of an object.

Work-Energy Principle

States that the net work done by all external forces acting on an object causes a change in the energy of the object.