Here is Usain Bolt’s 100 m world record time. What was his average speed during this race?

Here is Usain Bolt’s 100 m world record time. What was his average speed during this race?

SPEED

Speed tells us how fast an object is moving.

Speed = distance

time

Speed is measured in m/s or km/h

FIVE FACTS ON SPEED!

Speed tells us how many metres an object moves in one second.

Speed = distance_

time Speed is measured in metres per second. Speed can be measured in kilometres per hour. Nothing can travel faster than the speed of light.

How fast can I move? By making precise measurements

and calculations calculate how fast you can do the following things

1. Run 2. Hop 3. Walk 4. Skip like a girl.

How to Answer Speed Questions!

A man walks 20 m in 10 s. What is the man’s speed?

Step 1: FORMULA Speed = distance/ time (1 Mark)

Step 2: Working out! Speed = 20 m / 10s (1 mark)

Step 3: Answer with units

speed = 2 m/s (1 mark) (3 marks in total!!!!!!)

SPEED QUESTIONS

1. A man walks 400 m in 80 seconds. Calculate his speed.

2. A car drives 600 km in 3 hours. What was the cars average speed?

3. A giraffe, Dave, runs 220 m in 5 seconds. Find Dave’s speed.

4. A goat moves 2 km in 2 seconds. What was his speed and how did this happen?

5. A sheep runs at 5 m/s. How far will it move in 11 seconds?

ARE WE THERE YET? You are on your way to Dusseldorf in a car.

You still have 240 km to drive. How long will it take you if you drive at an

average speed of 80 km/h? How fast would you have to drive if you

wanted to get there in 2 hours? If you were stuck in a traffic Jam and could

only drive at 40 km/h how much further would you have travelled in 2 hours?

HARDER SPEEDY STUFF

1. A man moves 55 metres in 10 seconds. Calculate his speed!

2. A car drives 250 km in 1.5 hours. Calculate it’s speed.

3. A goat runs at 2 m/s for 12 seconds. How far does it move?

4. A sausage moves at 20 m/s for 100m. How long does it take to cover this distance?

5. A toady fish swims at 6 m/s for 4.5 seconds. How far did toady fish move in this time?