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Brief Questions and Answers (3 marks each)
1. While walking on a trampoline, do you feel more pressure when you stand still or jump up and down? Why does pressure change with movement?
2. How does the shape of a thumb pin help it penetrate surfaces easily?
3. If you blow up a balloon and then tie it closed, why does it stay inflated even though you stop blowing? How does pressure play a role here?
4. Why is an inner airtight layer of a space suit designed to maintain a constant pressure around the astronaut?
5. If a liquid has density twice the density of mercury, what will be the height of the liquid column in a barometer?
6. Why wouldn't we be able to sip water with a straw on the moon?
7. How are we able to break a metal wire by bending it repeatedly?
8. A spring, having a spring constant k, when loaded with mass 'm', is cut into two equal parts. One of the parts is loaded with the same mass m again. What will be its spring constant now?
9. Why do static fluids always exert a force perpendicular to the surface?
10. How can a small car lifter lift a load heavier than itself?