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TAsk 1 - Do now, have a think.
TAsk 1 - Do now, have a think.
This is desk toy is called a Newton's cradle. Take a good close look at it.
On your companion sheet write down your observations, then see if you can offer and explanation for the way that it moves.
Remember that this is just a gif image and not a video - why is that important?
Task 2 - Intro video
Task 2 - Intro video
Watch the video and answer the questions on the companion sheet.
Simple.
Task 3 - PAst paper Q
Task 3 - PAst paper Q
Have a look at the past paper question on the left. it is fairly typical of one that you might see on your GCSE paper.
Complete the question by filling in the blanks on the companion Sheet
crashes! - coming to a stop.......quickly
crashes! - coming to a stop.......quickly
Lots of safety features such as airbags, helmets and crash mats protect us for feeling large forces that could hurt us. They do this by increasing the time it takes for our bodies come to a stop.
Another way of saying this is to say it increases the time taken to change momentum to zero.
TAsk 4 - Applying knowledge
TAsk 4 - Applying knowledge
Now that we know about momentum, we can use the knowledge to keep us safe. Lots of times in our life we travel quickly, such as cycling, running or travelling in a car.
If things go wrong we come to a stop quickly too....but we can use our knowledge of momentum to try and protect ourselves.
Watch the video for more details and then answer the question on the companion sheet.
Task 5 - Conservation
Task 5 - Conservation
In a collision,
Total momentum before an event = Total momentum after the event
The equation to the left shows that:
Mass x Velocity BEFORE the event (1), is equal to, Mass x Velocity AFTER the event (2)
Worked Example
Worked Example
What is the velocity of the van after the collision?
What is the velocity of the van after the collision?
Calculate the momentum of the car.
Calculate the momentum of the van.
Add these together to get the Total Momentum before the crash.
Calculate the momentum of the car after the crash (note that the mas of the car and van does not change.)
Now you have all the information you need to work out the final velocity of the van......
All the missing momentum belings to the van. Use p=mv and rearrange to find the velocity of the van
Answer this question on your companion sheets then hand it in!
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