Speed, Forces, Friction and Pressure (Worksheet 1)
Speed
The Speed of an object is a measure of how fast it is moving.
The Velocity of an object is a measure of how fast it is moving and in which
direction it is moving.
For example.
Speed = 10 metres per second
Velocity = 10 metres per second northwards.
To find the speed of a specific object we need to know the distance it travelled
and how long it took to travel that distance. Then we can calculate the speed.
Of course there is an easy formula, which details the relationship between
speed, distance and time taken.
| Distance | ||
| Speed | = | |
| Time |
If drawn as a formula triangle, this formula would appear as:
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Answer the following:
| 1. |
A cyclist is travelling at
20 km/hour. How long will it take the cyclist to complete his 100 km
journey? |
Answer:_______ | |
| 2. |
A tennis ball is thrown
across a playground. It takes 10 seconds for the ball to travel across the
playground, which is 200 metres wide. What is the speed of the tennis ball? |
Answer:_______ | |
| 3. |
A bus is travelling at 40
km/ hour. How far will the bus travel in 4 hours? |
Answer:_______ | |
| 4. |
Jenny ran the 400 metres in
100 seconds? What speed was she running at? |
Answer:_______ | |
| 5. |
It takes 6 hours for Mr
Smith to travel by car to a conference 300 km away. What average speed was
Mr Smith travelling at? |
Answer:_______ | |
| 6. |
How long will it take a
cannonball to travel 500 metres at a speed of 25 metres/ second? |
Answer:_______ | |
| 7. |
If Ella has an average
swimming speed of 4 metres/second, how far will she swim in 3 minutes? |
Answer:_______ | |
| 8. |
Joshua walks at a speed of 8 km/ hour. How far will he walk in 15 minutes? | Answer:_______ |
