Natural Sciences and Technology Grade 5-B ... - Thunderbolt Kids

QUESTIONS
Look up adefinition for potential in your dictionary.
Having the capacity to do or develop into something in the
future. Synonyms are possibility/feasible.
A stretched elastic band can also produce movement and do work
in the future when it is released.
Let's look at another way of using an elastic band to produce
movement energy. We are not going to stretch, but rather twist
the elastic band.
ACTIVITY: Build an elastic powered boat
MATERIALS:
• rectangular wooden block (about 5cm by 8 cm by 2 cm)
• 2 ice cream sticks
• 1 piece of plastic (6 cm by 2,5 cm cut from a plastic coee tin
lid)
• 1 large rubber band
• 1 small rubber band
• a tub of water to test your boat in
INSTRUCTIONS:
1. Secure the ice cream sticks flat against the sides of the
wooden block with athick rubber band, so that about 1
of each stick is extending out beyond the end of the block.
46 Energy and Change
4
to 1
2