## Speed Formula

The speed formula is used to calculate the speed means to calculate how fast someone or something is travelling.

Speed can be measured as the distance an object travels in a given period

Speed is a scalar quantity as it defines only the magnitude, not the direction of the object

To calculate the average speed of an object if you know the time and distance travelled

The SI unit of speed is m/s

The formula for speed is speed = distance/time

In some cases, the formula can be used as

When speed and time are given, then the formula can be applied as

**distance = speed * time or d = s * t**

When speed and distance are given, then the formula can be applied as

**time = distance/speed or t = d/s**

## Example of Speed Formula

**1. A person runs 360 m in 60 seconds. Calculate his speed?**

Speed = distance / time

= 360/60

= 6 m/s

Speed is measured in meters per second(m/s) or kilometers per hour (km/h)

1 km = 1000 m and 1 hr = 3600 seconds

**Conversion method = 1 m/s x 1km/1000 m x 3600 sec/1 hr**

= 3600 m .km.s / 1000 s.m.hr = 3.6 km/1 hr

1 m/s = 3.6km/hr

**Q. What is 20 m/s in km/h?**

20 m/s X 3.6km/hr / 1m/s = 72 km/hr.

**Q. What is 120 km/hr in m/s?**

120 km/hr X 1 m/s / 3.6 km/hr = 33.3 m/s

**Q. A man covers 15 miles in 2 hours. Calculate his speed?**

Speed = distance/time

= 15/2

= 7.5 miles per hour