Embedded Files
what is apeed, distance and time?
what is apeed, distance and time?
Speed distance time is the formula used to explain the relationship between speed, distance and time. That is:
Speed = Distance ÷ Time
Time = Distance ÷ Speed
Distance = Speed × Time
Or to put it another way distance divided by speed will give you the time. Provided you know two of the inputs you can work out the third.
For example if a car travels for 2 hours and covers 120 kilometres we can work out speed as 120 ÷ 2 = 60 km per hour.
The speed distance time triangle is a way to describe the relationship between speed, distance and time.
SPEED
SPEED
Speed tells us how fast something is moving.
It measures the distance travelled per unit of time.
Common units:
metres per second (m/s)
kilometres per hour (km/h)
Example: A car travels 150 km in 3 hours. What is its speed?
Speed=Distance/Time
Speed=150/3
Speed-50km/h
The car therefore travels 50 km/h.
time
time
Time is how long it takes for an event or motion to happen. It is measured in units such as:
seconds (s)
minutes (min)
hours (h)
Time always moves forward.
Time is needed to calculate speed.
Example: A runner runs 800 m at a speed of 4 m/s. How long does it take?
Time=Distance/Speed
Time=800/4
Time=200 seconds
Therefore, It takes 200 seconds (or 3 minutes 20 seconds).
distance
distance
Distance is how far an object travels. It is measured in units such as:
metres (m)
kilometres (km)
centimetres (cm)
Distance is always positive.
It does not show direction (if you want direction, you use displacement)
Example: A cyclist rides at 20 km/h for 2.5 hours. How far does she travel?
Distance=Speed×Time
Distance=20×2.5
Distance=50 km
Therefore, she travels 50 km.
Units of speed, distance and time
Units of speed, distance and time
The speed of an object is the magnitude of its velocity.
We measure speed most commonly in metres per second (m/s), miles per hour (mph) and kilometres per hour (km/hr).For example; The average speed of a small plane is 124km/h.
We measure the distance an object has travelled most commonly in millimetres (mm), centimetres (cm), metres (m) and kilometres (km).
Page updated
Report abuse