A bottle is filled with water. A cap is put on the bottle and it is turned upside
down. There is no air inside the bottle. The area of the cap in contact with the
water is 4.0 × 10–4 m2. The density of water is 1000 kg m–3 and the gravitational
field strength is 10 N kg–1. The water produces a force on the cap.
What is the value of this force?

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Solution

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Here we get only the force acting per length on the cap because the height of bottle is not given.
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download pic and read.. Here we get only the force acting per length on the cap because the height of bottle is not given. Like if satisfied

download pic and read..

Here we get only the force acting per length on the cap because the height of bottle is not given.
Like if satisfied