Question

1.
2.
2. (a) Why do mountaineers suffer nose bleeding at high altitudes? (b) How does atmospher
C. Short Answer Type
How can you feel one newton force?
Explain why an apple dropped from a height always falls down on the earth.
3. What is meant by force of gravity?
4. Explain why astronauts wear specially designed spacesuits.
5. Where is the pressure greater, 10 m or 20 m below the surface of the sea? Give reason.
D. Short Answer Type-Il Questions:
Explain why a wide steel belt is provided over the wheels of army tanks.
1.
Value Cor
E.
1.
pressure help in drinking juice with straw?
3.
Nitika is cutting fruits for her grandmother as she is all she finds it difficult to cut fruits.
sharpens the cutting edge of the knife and cuts the fruits easily.
(a) How does sharpening the knife help in cutting the objects easily?
(b) What can you learn from Nitika?
Long Answer Questions:
Explain why (a) a heavy truck is fitted with six to fourteen tyres, (b) skiers use long flat skis to
over snow, (c) foundations of high-rise buildings are kept wide.
Give reasons:
(a) School bags are provided with wide straps to carry them.
(b) The walls of a dam are thicker near the bottom than at the top.
3. (a) What is atmospheric pressure?
(b) Why is our body not crushed by the enormous pressure exerted by the atmosphere?
(c) Give one application of atmospheric pressure from everyday life.
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Answer 1

Answer:

because on higher places like mountains there's oxygen is very less so, that's why the mountaineers faces suffer with nose bleeding at high altitudes