Speed

• Science
• Lower Secondary (Key Stage 3)

State a unit for speed

Which is the correct equation for speed?

1. speed = time / distance
2. speed = time x distance
3. speed = distance / time
4. speed = distance x time

What is the speed of a car travelling 10 meters in 1 second

1. 100 m/s
2. 10 m/s
3. 1 m/s
4. 1000 m/s

What is the speed of a car travelling 20 meters in 1 second

1. 200 m/s
2. 20 m/s
3. 2 m/s
4. 2000 m/s

What is the speed of a car travelling 20 meters in 2 seconds

1. 100 m/s
2. 10 m/s
3. 1 m/s
4. 1000 m/s

What is the speed of a person walking 16 meters in 8 seconds

1. 32 m/s
2. 24 m/s
3. 8 m/s
4. 2 m/s

What is the speed of a person walking 450 meters in 300 seconds

1. 15 m/s
2. 150 m/s
3. 1.5 m/s
4. 750 m/s

If two objects are moving in opposite directions you add their speeds together.

If two objects are moving in the same direction you subtract their speeds from each other.

Resultant Speed

What is the resultant speed of these two cars?

What is the resultant speed of these two cars?

What is the resultant speed of these two cars?

What is the resultant speed of these two cars?

What is the resultant speed of these two cars?

What is the resultant speed of these two cars?

Distance-Time graphs

The object was stationary during...

It was fastest during the letter...

It moved backwards at...

It moved slowest at...
(do not count stationary)

Come up with a story to describe the movement in this graph