Work, Energy, and Power in Technical Science

These flashcards cover essential vocabulary and concepts related to work, energy, and power in technical science, beneficial for Grade 12 students preparing for exams.

Work (W)

The product of force (F) acting on an object and the displacement (∆x) in the direction of the force.

Potential Energy (EP)

The energy of an object due to its position in a gravitational field, calculated as EP = mgh.

Kinetic Energy (EK)

The energy of an object due to its motion, calculated as EK = 1/2 mv².

Power (P)

The rate at which work is done or energy is expended, with the formula P = W/Δt.

SI Unit of Work

Joule (J), which is equivalent to 1 Newton meter (1 J = 1 N·m).

Conservation of Mechanical Energy

The principle stating that the total mechanical energy in an isolated system remains constant.

Scalar Quantity

A physical quantity that has magnitude only and no direction.

Vector Quantity

A physical quantity that has both magnitude and direction.

Watt (W)

The SI unit of power, equal to 1 joule per second (1 W = 1 J/s).

Force Diagram

A graphical representation that shows all the forces acting on an object.

Free Body Diagram

A diagram that shows all the external forces acting on an object, along with their directions.

1 Horsepower (hp)

Equivalent to 746 Watts.

Work Done

The amount of energy transferred when a force is applied to an object and it moves through a distance.

Formula for Work

W = F∆x cosθ, where θ is the angle between the force and displacement vectors.

Mechanical Energy (ME)

The total energy of an object, which is the sum of its kinetic and potential energy (ME = EK + EP).

Work (W)

The powerful product of force (F) acting fiercely on an object and the displacement (∆x) in the direction of that unstoppable force.

Potential Energy (EP)

The immense energy of an object due to its elevated position in a gravitational field, calculated as EP = mgh, showcasing its potential to do work.

Kinetic Energy (EK)

The dynamic energy of a swift-moving object, calculated as EK = 1/2 mv², representing the vigor of motion.

Power (P)

The extraordinary rate at which work is accomplished or energy is unleashed, with the formula P = W/Δt, highlighting the intensity of energy transfer.

SI Unit of Work

Joule (J), a significant measure equivalent to 1 Newton meter (1 J = 1 N·m), embodying the work done.

Conservation of Mechanical Energy

The steadfast principle stating that the total mechanical energy in an isolated system remains constant, preserving its energy integrity.

Scalar Quantity

A straightforward physical quantity that possesses magnitude only, without any direction, a basic yet powerful characteristic.

Vector Quantity

An intricate physical quantity that encompasses both magnitude and direction, emphasizing the multidimensional nature of forces.

Watt (W)

The SI unit of power, a radical benchmark equal to 1 joule per second (1 W = 1 J/s), epitomizing the intensity of energy flow.

Force Diagram

A compelling graphical representation that illustrates all the forces acting on an object, clarifying the dynamics at play.

Free Body Diagram

A clear and informative depiction that showcases all the external forces acting on an object, along with their decisive directions.

1 Horsepower (hp)

An astonishing measurement equivalent to 746 Watts, showcasing the power exerted in motion.

Work Done

The substantial amount of energy transferred when