Natural Sciences and Technology Grade 5-B ... - Thunderbolt Kids
Natural Sciences and Technology Grade 5-B ... - Thunderbolt Kids
Natural Sciences and Technology Grade 5-B ... - Thunderbolt Kids
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6. Use a rubber b<strong>and</strong> to secure the plastic spoon on the end.<br />
You now have a simple catapult.<br />
7. Use the marshmallows <strong>and</strong> shoot these by placing one on the<br />
spoon, pulling down <strong>and</strong> then releasing it.<br />
8. Have a competition to see who can shoot marshmallows the<br />
furthest <strong>and</strong> the most accurately – can you hit atarget?!<br />
QUESTIONS:<br />
1. How are you able to shoot amarshmallow closer or further<br />
away?<br />
Pulling the spoon down further will make the marshmallow<br />
shoot further.<br />
2. When the marshmallow goes as far as possible, how much did<br />
the elastic b<strong>and</strong> stretch compared to when the marshmallow<br />
did not go far?<br />
The greater the stretch of the elastic b<strong>and</strong>, the further the<br />
marshmallow went.<br />
3. Where did the movement energy of the marshmallow come<br />
from?<br />
Stored energy in stretched elastic.<br />
We saw in this activity that if you stretch an elastic b<strong>and</strong>, you can<br />
produce movement. The stored energy in the b<strong>and</strong> when it is<br />
stretched has the potential to do work. We call the stored energy<br />
in the elastic b<strong>and</strong> potential energy because it has the potential to<br />
do something for us later. But what does the word potential mean?<br />
Chapter 3. Energy <strong>and</strong> movement<br />
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