Advertisements
Advertisements
प्रश्न
Complete the analogy.
Downward force: Weight:: Upward force offered by liquid: _____
Advertisements
उत्तर
Downward force: Weight:: Upward force offered by liquid: Buoyant force.
APPEARS IN
संबंधित प्रश्न
What is meant by the term ‘buoyancy’ ?
Why does a block of wood held under water rise to the surface when released ?
What happens to the buoyant force as more and more volume of a solid object is immersed in a liquid ? When does the buoyant force become maximum ?
What is meant by pressure? State its S.I. unit.
The diagram below in Fig. 4.12 shows a device which makes the use of the principle of transmission of pressure.
- Name the parts labelled by the letters X and Y.
- Describe what happens to valves A and B and to the quantity of water in the two cylinders when the lever arm is moved down.
- Give reasons for what happens to valves A and B in part (ii).
- What happens when the release valve is opened?
- What happens to valve B in cylinder P when the lever arm is moved up?
- Give a reason for your answer in part (v).
- State one use of the above device.
The pressure P1 at a certain depth in river water and P2 at the same depth in sea water are related as :
Why is a force needed to keep a block of wood inside water?
A body will experience minimum upthrust when it is completely immersed in :
Select the correct option.
The unit Nm2 is the unit of
State whether true or false. If false, correct the statement.
The weight of fluid displaced determines the buoyant force on an object.
