Page 135 - SK Year 6 Science DLP

KELAJUAN
SPEED
SPEED
Speed has a relationship with the distance travelled by an object and the
time taken for it to travel. Therefore, speed can be calculated by dividing the
distance travelled with the time taken. Speed can be calculated using the
formula below.

Distance
Speed =
Time

Observe the following situation.

This train took 2 hours
to travel 200 km. What
is its speed?

Distance
Speed =
Time
200 km
=
2 hours
= 100 km/h

In a relay race, Amir ran 100 metres in 50 seconds.
What is his speed?

Q

1. A motorcycle took 1 minute to travel 600 metres. What is the speed
in m/s?
2. A tortoise travels with a speed of 25 cm/s. How far can the tortoise
travel in 4 seconds?

CLICK
The speed of light is faster than the speed of sound. Therefore, during lightning,
you will see strikes of light before the sound of thunder is heard. The speed of
sound is 344 m/s in dry air at the temperature of 20°C.

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