1 . olympic swimmers wear light swimming suit and streamlined their water bodies to reduce friction
(a) do you think shaving heads could give athletes advantage? why?
2 . why do tyres have threads?are wider tyres better than narrow ones?why?
3 . There are two holes at different heights A&B. What do you expect to happen when you remove tape from one of the holes ? What will happen as soon as the tape is removed ? What will happen over time , as the water level drops in the bottle ?
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the tyres have threads because the threads helps us to give grip on the surface of road.
the tyres are narrower because the vehicle wants to carry heavy objects so the objects may be weight so the tyres are wider tyres
the tyres have threads because the threads helps us to give grip on the surface of road.
the tyres are narrower because the vehicle wants to carry heavy objects so the objects may be weight so the tyres are wider tyres
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