Page 73 - York Global Science 6 - Physical Science

Physical Science

Let’s Learn

Speed is a measure of how fast something is moving.

We can use adjectives to describe the speed of an object or person, but
sometimes we need to know exactly how fast something is moving.

You can use a formula to work out the average speed if you know the
distance travelled and the time taken to travel that distance.

distance
speed = distance
time
speed time

Speed, distance and time are all related to each other.
If you have any two measurements from the triangle you can find out the
other one:

distance
distance

speed time
speed time

time = distance distance = speed × time
speed

We decide what units to use for speed when we know the units used for

time and distance.

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