Question

Give reasons for:
(b)once you stop rowing a boat, it stops after a while,
(c) A plastic comb after combing dry hair attracts small pieces of paper near it.
(d) Water flows towards the ground as soon as we open a tap.
(e) You find it more comfortable to hang a heavy bag with a broad strap than
a narrow one on your
(f) Width of tyres of trucks is larger than those used in cars.
(g) Tools meant for piercing always have a sharp edge.
(h) We are not crushed by the atmospheric pressure.
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Answer 1

(b) It is the force of friction between the surface of water and the boat that brings the boat to rest once we stop rowing.

Answer 2

1. bhoot stops after a while because the force of the water is high so it take a while to stop the boat
2. our hair has the type of power which produce a type of magnetic power and then for sometime it pull the paper
3. this is happened because of gravity
4. because it gives support to us and it is comfortable because the belt is tight and also because of that the bag doesn't go down because of gravity
5. because trucks have more weight than the card and also if you will see by has only two Tyres wipe it is by has less weight than the car and truck so it is dependent on the weight that how much time is used
6. because the soil is hard to dig with hand and tool is pointed from the edge with pointed nail is always hard to every surface
7. because atmospheric pressure is not the pressure like of water or the soil as atmospheric pressure as are the particles of air and air is very light.

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