Velocity Calculator: Solve Motion Problems with Ease | Physics Tool
Type your displacement and time, press “Calculate,” and the tool returns velocity in m/s—no manual math needed. Average adult walking speed is 1.4 m/s (Knoblauch, 1996).
Velocity Calculator
Result
Step-by-Step Solution
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How to use the tool
Enter displacement (m): e.g., 120 or 2 000. Negative values are invalid.
Enter time (s): e.g., 30 or 400. Time cannot be zero.
Press “Calculate Velocity”: The result, step-by-step breakdown, and motion graph appear instantly.
Formula applied
Velocity is calculated with
$$v = rac{\text{Displacement}}{\text{Time}}$$
Example 1
Displacement: 120 m
Time: 30 s
$$v = rac{120}{30} = 4 \text{ m/s}$$
Example 2
Displacement: 2 000 m
Time: 400 s
$$v = rac{2000}{400} = 5 \text{ m/s}$$
Quick-Facts
SI unit: metre per second (m/s) (NIST, 2019).
Average walking speed: 1.4 m/s (Knoblauch, 1996).
Urban speed limit: 50 km/h ≈ 13.9 m/s (WHO, 2018).
Speed of sound at 20 °C: 343 m/s (NASA, 2021).
Low-Earth-orbit velocity: ~7 800 m/s (ESA, 2022).
FAQs
What is velocity?
Velocity is a vector showing how fast and in what direction an object changes position (ISO 80000-3). “Velocity equals displacement divided by time” (ISO 80000-3).
Why does the tool reject negative time values?
Time in physics represents duration and must be non-negative; negative input would violate causality (Serway, 2018).
Which unit does the calculator use?
The output is metres per second, the SI derived unit for velocity (NIST, 2019).
Can I switch to kilometres per hour?
Multiply the m/s result by 3.6 to obtain km/h (BIPM, 2020).
A straight line indicates constant velocity; its slope equals your calculated velocity (OpenStax Physics, 2021).
Does the calculator consider direction?
No. It treats displacement as scalar distance, so output is speed’s magnitude only. Add sign manually for direction.
How do I validate my manual work?
Re-enter the same values; the step-by-step section mirrors textbook calculations for quick cross-checking (Giancoli, 2014).
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