Q1 of 7 Page 35

Answer the following question.

Why are ski-boards that are used to glide over snow long and broad?

We know that pressure depends on the surface area ().The large is the surface area less is the pressure produced. Therefore the ski-boards are long and broad to increase the surface area, which reduces the pressure on snow and we will not sink in snow.


More from this chapter

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1

Answer the following question.

Why do knives and blades have sharp edges?

 1

Answer the following question.

Why does ink not spill out of an ink dropper?

 2

Fill in the blanks.

(a) The unit of pressure is _______.


(b) Ink rises into the ink dropper because of the _______ pressure acting on the surface of the ink in the bottle.


(c) When the piston of a pump is pulled up, the pressure inside _______.


(d) The air pressure inside our body is equal to the _______ .

 3

Match the following.