Physics Test Review Flashcards

Flashcards covering key concepts in physics related to mechanics, electricity, and energy.

Electrical Conductor

A material that allows electric current to flow through it easily, such as copper.

Ohm's Law

The relationship between voltage (V), current (I), and resistance (R) expressed as V = I × R.

Resistance

The opposition to the flow of electric current, measured in ohms.

Repulsive Force

The force that pushes two charged objects apart; increases with charge.

Gravitational Force

The attractive force between two masses, which changes with distance.

Kinetic Energy

Energy that an object possesses due to its motion, expressed as KE = rac{1}{2}mv^2.

Torque

A measure of the rotational force applied at a distance from a pivot point.

Second Law of Kepler

The law stating that planets travel faster when they are closer to the sun, not limited to circular or elliptical orbits.

Mechanical Disadvantage

A situation where more force is required than what is being lifted; common in muscle mechanics.

Unit of Work

The Joule, which measures energy expended when a force moves an object.

Tendon Injuries

Injuries that can occur when muscles exert force, particularly at mechanical disadvantages.

Ampere

The unit of electric current, representing the flow of charge.

Load Weight

The weight an individual can lift based on muscle strength and leverage.

Energy Expenditure

The amount of energy used during physical activity, commonly measured in joules.

Inertia

The tendency of an object to remain at rest or in uniform motion unless acted upon.

Newton's Third Law

For every action, there is an equal and opposite reaction.

Mechanical Advantage

A ratio that describes the benefit gained from using a mechanical system to lift or move a load.

Coulomb

The unit of electric charge.

Watt

The unit of power, equal to one joule per second.

Charge Flow

The movement of electric charge, contributing to the flow of current.

Force Exerted

The effort applied to lift or move a weight.