Physics Measurement and Scientific Investigation Flashcards

Flashcards related to measurements, quantities, and scientific investigations.

Physical Quantity

A measurable quantity that contains both magnitude and a unit.

Base Quantities

Physical quantities that cannot be defined in terms of other physical quantities (e.g., length, mass, time).

Derived Quantities

Physical quantities derived by combining base quantities through multiplication, division, or both (e.g., area, volume, speed).

Scalar Quantities

Physical quantities that have only magnitude (e.g., distance, speed, time, mass, energy).

Vector Quantities

Physical quantities that have both magnitude and direction (e.g., displacement, velocity, weight, force, acceleration).

Measurement

Method to determine physical quantities

Area

A derived quantity with the SI unit of m^2.

Volume

A derived quantity with the SI unit of m^3.

Velocity

A derived quantity with the SI unit of ms-1.

Acceleration

A derived quantity with the SI unit of ms-2.

Force

A derived quantity with the SI unit of mass x acceleration.

Pressure

A derived quantity with the SI unit of Force / Area.

Work Done

A derived quantity with the SI unit of Force x Distance

Directly Proportional

Describes when one variable 'y' increases linearly with another variable 'x'.

Inversely Proportional

Describes when one variable 'y' decreases linearly as another variable 'x' increases.

Gradient of a graph

Can be determined with: 𝑚 = (𝑦 2 − 𝑦 1) / (𝑥 2 − 𝑥 1)

Interpolation

Finding value of x when y is at a certain value and vice versa.

Extrapolation

Extending the graph to find other information.