## Speed, Time & Distance

Múinteoir Clíona's lesson today was all about distance, speed and time.

Distance is how far something travels

Speed is how fast something travels.

Time is how long something takes to happen.

The distance, speed and time triangle is an easy way to remember the formulae to help you work out problems.

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## Zombie Quiz

1) A zombie walks at a pace of 2km/h.  There is a zombie 10km from Dave's house.  How long will it take for the zombie to reach Dave?

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2)  Dave runs to his parents’ house at a steady speed of 15km/h.  It takes Dave 3 hours to get there. How far away is his parents’ house?

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3)  Dave and his parent’s jump in the car and drive 150km to the ferry. It takes them 1.5 hours to get to the ferry.  How fast were they going?

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4) Some zombies follow the ferry.  They are fast, they can swim 100km in 2 hours.  Dave’s ferry is travelling at 45km/hour.  Who is faster?  Can the zombies catch the ferry?

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## The fastest living things on the planet

Fastest Human - Usain Bolt has reached the speed of 44km/h

Fastest Land animal – Cheetahs have been known to reach speeds of up to 120km/h

Fastest fish - Black marlin have been recorded swimming at 129km/h

Fastest bird (diving) – When the peregrine falcon is chasing prey it closes its wings and falls from the sky in a spectacular vertical stoop, doing this it can reach speeds of over 300km/h!!

One last question for you.  If a cheetah were running at full speed of 120km/ h how long would it take her to travel the 300km from Dublin to Tralee?

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Answers: 1) 5 hours 2) 45 kms 3) 100km/h 4) The zombies are faster, swimming at 50km/h.  Yes, they will catch up with the ferry. Cheetah question = 2.5hrs / 2hrs 30mins.