Search results
The formula for speed is speed = distance ÷ time. To work out what the units are for speed, you need to know the units for distance and time. In this example, distance is in metres (m) and time...
This formula shows that: Speed increases if you cover more distance in the same amount of time, or if you cover a distance in less time. Distance can be calculated if you know the speed and time, with the formula: distance = speed × time.
Oct 21, 2023 · Solve for speed, distance, time and rate with formulas s=d/t, d=st, d=rt, t=d/s. Calculate rate of speed given distance and time. Find mph, miles per hour, km/hour.
The resultant velocity calculator allows you to add up to five different velocity vectors, determining the absolute value of the resultant velocity, its direction, and its x and y components.
- Speed and Velocity
- Speed
- Units
- Average vs Instantaneous Speed
- Constant Speed
- Velocity
- Relative
Speed is how fast something moves. Velocity is speed with a direction. Saying Ariel the Dog runs at 9 km/h(kilometers per hour) is a speed. But saying he runs 9 km/h Westwardsis a velocity. Imagine something moving back and forth very fast: it has a high speed, but a low (or zero) velocity.
Speed is measured as distance moved over time. Speed = Distance Time We can also use these symbols: Speed = Δs Δt Where Δ ("Delta") means "change in", and 1. smeans distance ("s" for "space") 2. tmeans time
Speed is commonly measured in: 1. meters per second (m/s or m s-1), or 2. kilometers per hour (km/h or km h-1) A km is 1000 m, and there are 3600 seconds in an hour, so we can convert like this (see Unit Conversion Methodto learn more): So 1 m/s is equal to 3.6 km/h
The examples so far calculate average speed: how far something travels over a period of time. But speed can change as time goes by. A car can go faster and slower, maybe even stop at lights. So there is also instantaneous speed: the speed at an instantin time. We can try to measure it by using a very short span of time (the shorter the better).
When the speed does not change it is constant. For constant speed, the average and instantaneous speeds are the same.
Velocity is speed with a direction. It is actually a vector ... ... as it has magnitude anddirection Because the direction is important velocity uses displacementinstead of distance: Speed = Distance Time Velocity = Displacement Time in a direction. Learn more at Vectors.
Motion is relative. When we say something is "at rest" or "moving at 4 m/s" we forget to say "in relation to me" or "in relation to the ground", etc. Think about this: are you really standing still? You are on planet Earth which is spinning at 40,075 km per day (about 1675 km/h or 465 m/s), and moving around the Sun at about 100,000 km/h, which is ...
Average speed is a compound measure which is usually given in the units metres per second (m/s), miles per hour (mph) or kilometres per hour (km/h). We can calculate average speed using the formula, \text{average speed } = \frac{\text{total distance}}{\text{total time}}.
Speed is worked out by dividing the distance (60 km) by the time (1۰5 hours). For the line segment AB, 60 ÷ 1۰5 = 40. The speed is 40 km/h.
