Understanding Work and Energy

A collection of 55 flashcards focusing on key concepts, definitions, and examples related to work and energy based on lecture notes.

Work

The product of force and the displacement in the direction of the force.

Force

A push or pull that can cause an object to accelerate.

Displacement

The distance moved in a specified direction.

Joule (J)

The SI unit of work and energy.

Energy

The ability to do work.

Mechanical Energy

Energy associated with the motion and position of an object.

Thermal Energy

Energy related to the temperature of an object.

Nuclear Energy

Energy stored in the nucleus of an atom.

Chemical Energy

Energy stored in the bonds of chemical compounds.

Electromagnetic Energy

Energy that travels through space as electromagnetic waves.

Sonic Energy

Energy associated with sound waves.

Gravitational Energy

Potential energy related to an object's height above a reference point.

Kinetic Energy

Energy possessed by an object due to its motion.

Potential Energy

Stored energy based on an object's position.

Ionization Energy

The energy required to remove an electron from an atom.

Work Done

The condition under which energy is transferred when an object moves in the direction of a force.

Two Conditions for Work

1. A force must act on an object. 2. The object must move in the direction of the force.

Scenario with Work Done

A situation where a force causes an object to move in the direction of that force.

Scenario without Work Done

A situation where an object does not move in the direction of an applied force.

Work Equation

Work done = force x displacement.

Newton-Meter (Nm)

Another unit for work, equivalent to one joule.

Ascent Phase

The phase in an exercise movement where the weight is lifted.

Bench Press Example

A practical application of work done using a barbell.

Work Calculation Example

Calculating work done using the formula work = force x distance.

Energy vs Work

Energy is the capacity to do work, while work is the application of force over a distance.

Real-Life Examples of Work Done

Instances illustrating where work is performed, such as lifting an object.

No Work Done Example

When an object remains stationary despite an applied force.

Applied Force Direction

The direction in which a force is exerted on an object.

Direction of Motion

The path along which an object moves in response to a force.

Unit of Energy

The joule is the standard unit used in physics to measure energy.

Work Drills

Exercises to practice calculating work using different variables.

Force in Bench Press

The force exerted by the lifter to lift the barbell.

Work Done in Bench Press

The specific calculation of work done to lift a weight during the exercise.

Work Formula Derivation

Understanding how to arrive at the formula for work done in physics.

Average Force

The total force applied divided by the duration of the force application.

Displacement in Physics

The total change in position of an object during a force application.

Interaction of Forces

The way forces act on objects to create movement or maintain rest.

Force and Distance Relationship

The relationship describing how force and distance work together to produce work.

Physical Science

The study of matter and energy and their interactions.

Energy Conservation

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

Work and Machines

Application of work and energy concepts in mechanical systems.

Scientific Notation in Work

Expressing large or small numbers in a simplified format for calculations.

Energy Transfer

The movement of energy from one place or system to another.

Power vs Work

Power is the rate at which work is done over time.

Example of Energy Form

Different states of energy such as kinetic or potential.

Work in Everyday Life

Identifying common tasks where work and energy principles apply.

Mathematical Representation of Work

Using numerical equations to describe the work done in various scenarios.

Physics Lab Experiments

Practical applications of work and energy principles in experiments.

Energy Sources

Different origins of energy like fossil fuels, solar, and wind.

Physical Education Connection

Understanding how work and energy relate to sports and physical activities.