Motion and Speed Notes

Motion

The spatial displacement of an object over time relative to a designated frame of reference.

Speed

A scalar quantity measuring the rate at which an object covers distance, defined exclusively by magnitude.

Average Speed Formula

$v = \frac{d}{t}$, where $v$ represents speed, $d$ represents distance, and $t$ represents time.

SI Unit of Speed

Meters per second ($\text{m/s}$ or $\text{m}\,s^{-1}$).

Constant Velocity

Motion at a constant speed in an unchanging, straight-line direction, which is a vector quantity with both magnitude and direction.

Constant Velocity Formula

$v = \frac{\Delta x}{\Delta t}$, where $v$ represents velocity, $\Delta x$ represents displacement, and $\Delta t$ represents time interval.

Acceleration under Constant Velocity

Zero acceleration ($a = 0\,\text{m/s}^2$).

Net Force under Constant Velocity

Zero net external force ($F_{\text{net}} = 0\,\text{N}$), according to Newton's First Law.