Dynamics

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Pressure Noun

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[presh-er]

Back

Pressure

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The amount of force applied perpendicular to a surface per unit area over which that force is distributed.

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Example: This image shows that atmospheric pressure is higher at lower altitudes because there is more air (weight) above, and lower at higher altitudes.

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Energy Noun

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[en-er-jee]

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Energy

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The quantitative property that must be transferred to an object in order to perform work on, or to heat, it.

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Example: This image illustrates that energy comes in many forms, showing examples like kinetic energy (a moving swing) and potential energy (a book on a slide).

Front

Density Noun

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[den-si-tee]

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Density

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The measure of mass per unit of volume of a substance, indicating how compact the matter is within it.

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Example: This experiment shows that the less dense pumice stone floats in water, while the more dense obsidian stone sinks, demonstrating how density affects buoyancy.

Front

Homogeneous Equation Noun

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[hoh-moh-jee-nee-us i-kwey-zhuhn]

Back

Homogeneous Equation

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An equation in which the base units are the same on both sides, proving its dimensional consistency and validity.

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Example: This balanced scale represents an equation where both sides are equal, resulting in a net value of zero, similar to a physical system with no external forces.

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Unit Prefix Noun

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[yoo-nit pree-fiks]

Back

Unit Prefix

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A specifier that is placed before a unit of measure to indicate a multiple or submultiple of that unit.

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Example: This chart shows common metric prefixes, like 'kilo-' for 1,000 and 'milli-' for 0.001, which are used to describe multiples or fractions of base units.

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Force Noun

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[fawrs]

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Force

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An interaction that, when unopposed, will change the motion of an object; essentially a push or a pull.

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Example: A person applies a force (a push) to an object, shown by the arrow, which can cause the object to move or change its state of motion.

Front

Upthrust Noun

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[uhp-thrust]

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Upthrust

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The upward buoyant force exerted by a fluid that opposes the weight of a partially or fully immersed object.

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Example: An upward force, called upthrust or buoyant force, pushes on objects submerged in a fluid (like water or air), making them float or feel lighter.

Front

Contact Force Noun

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[kon-takt fawrs]

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Contact Force

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A force that acts on an object by direct contact with it, as opposed to a force acting at a distance.

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Example: A person pushing a wall is an example of a contact force, where the force is applied only when the person and the wall are touching.

Front

Mass Noun

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[mas]

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Mass

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A measure of the amount of matter in an object and its intrinsic property of inertia, typically measured in kilograms.

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Example: This diagram shows that mass (m) is a key part of the dynamics formula F=ma, defining it as the scalar quantity that links force and acceleration.

Front

Weight Noun

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[weyt]

Back

Weight

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The force of gravity acting on an object, calculated as its mass multiplied by the acceleration of free fall.

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Example: This image shows a spring balance, a tool used in science to measure weight. Weight is a force, measured in Newtons (N), as shown on the scale.