In addition to the seven fundamental quantities, there are derived quantities that are combinations of the fundamental ones. These include quantities like velocity, acceleration, force, and energy.
1. Velocity (or Speed)
- Definition: The rate of change of position of an object.
- Unit: Meters per second (m/s)
- Formula: v=displacementtimev = \frac{\text{displacement}}{\text{time}}v=timedisplacement
2. Acceleration
- Definition: The rate of change of velocity.
- Unit: Meters per second squared (m/s²)
- Formula: a=ΔvΔta = \frac{\Delta v}{\Delta t}a=ΔtΔv
3. Force
- Definition: A push or pull on an object that causes a change in motion.
- Unit: Newton (N)
- Formula: F=maF = maF=ma (Force equals mass times acceleration)
4. Energy
- Definition: The capacity to do work. Energy can exist in many forms, including kinetic, potential, thermal, etc.
- Unit: Joule (J)
- Formula: E=F⋅dE = F \cdot dE=F⋅d (Energy equals force times distance)
5. Power
- Definition: The rate at which work is done or energy is transferred.
- Unit: Watt (W)
- Formula: P=EtP = \frac{E}{t}P=tE (Power equals energy divided by time)
6. Pressure
- Definition: The force applied per unit area.
- Unit: Pascal (Pa)
- Formula: P=FAP = \frac{F}{A}P=AF
7. Frequency
- Definition: The number of occurrences of a repeating event per unit time.
- Unit: Hertz (Hz), where 1 Hz = 1 cycle per second.
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