Units of velocity 40m/s/s,-5m/s/s Formula for acceler 30m/s 20 mph 30m/s east, 20 mph no cm/s south wee

The units of velocity are **m/s (meters per second)** or other units of distance divided by time, such as **km/h (kilometers per hour)**, **mi/h (miles per hour)**, **ft/s (feet per second)**, etc. Velocity is a vector quantity, meaning it has both magnitude (speed) and direction.<br /><br />The examples you provided seem to be mixing up velocity and acceleration. Let's break them down:<br /><br />* **40 m/s/s and -5 m/s/s:** These are units of *acceleration*, not velocity. The correct unit for acceleration is **m/s² (meters per second squared)**. Acceleration represents the rate of change of velocity.<br /><br />* **Formula for acceleration:** Acceleration is calculated as the change in velocity divided by the change in time. The formula is: *a = (v_f - v_i) / t* , where *a* is acceleration, *v_f* is final velocity, *v_i* is initial velocity, and *t* is time.<br /><br />* **30 m/s:** This is a unit of *velocity* (specifically speed, the magnitude of velocity). It needs a direction to be a complete velocity vector (e.g., 30 m/s north).<br /><br />* **20 mph:** This is also a unit of *velocity* (speed). Like the previous example, it needs a direction to be a complete velocity vector.<br /><br />* **30 m/s east, 20 mph north:** These are examples of correctly expressed velocities, having both magnitude (speed) and direction.<br /><br />* **cm/s south:** This is a unit of velocity, with cm/s representing centimeters per second.<br /><br />* **"wee":** This is not a standard unit of measurement for any physical quantity.<br />