Questions:
1. Which of the marbles reach the bottom first? the small or the big marble? Explain your
observation.
2. In set up 2, which marble reached the bottom first? Why is this so?
Let's Go Beyond:
1.Why it is harder to walk on a wet road on a dry one?
2.Why is it harder to go upstaairs than to go downstairs?
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Answer:
1)If it is downward the big marble reaches the bottom first
2)Viscosity is a measurement of a fluid’s resistance to change or deformation, or more simply put, how thick it is. A fluid can be a gas or a liquid, and it is easy to see that liquids are thicker than gases, and therefore have higher viscosities. Of course, some liquids are more viscous than others. For example, honey is more viscous than water. Can you imagine trying to swim in a pool of honey instead of water.
Let's Go Beyond:
1)On the wet surface the friction is very low than the normal walking surface as layer of water makes the floor smooth. ... It is difficult to walk on a smooth or wet floor because friction is very less .
2)Going upstairs is harder than going downstairs due to the force of gravity. Gravity is a non contact force that pulls objects towards the ground. It is hard to go upstairs because, we will be opposing the force of gravity by going up.
ANSWER
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