Advertisements
Advertisements
Question
Advertisements
Solution
Depth of water= 6 cm = 0 .06 m.
Density of water = 1000 kgm-3.
Acceleration due to gravity = 10 ms-2.
We know pressure
P = h x p x g.
P = 0.06 x 1000 x 10 = 600 Nm-2= 600 Pa.
Area of base of cylindrical vessel = 300 cm2 = 300 x 10-4m2= 0.03 m2.
We know
Thrust = pressure x area.
Thrust =600 x 0.03 = 18 N.
So thrust acting on the base of the vessel is 18 N.
APPEARS IN
RELATED QUESTIONS
The relative density of alcohol is 0.8. Its density is
Distinguish between density and relative density.
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.
Will a body weigh more in air or vacuum when weighed with a spring balance? Give a reason for your answer.
How is the upthrust related to the volume of the body submerged in a liquid?
The blood pressure reading of a patient is recorded 160/100. Express the lower pressure in SI units.
[Take density of mercury as 13.6 × 103 kgm−3 and the value of ‘g’ as 10 ms−2]
Write the SI units of Buoyant force
What is meant by up thrust?
Is pressure a vector quantity?
Complete the analogy.
Downward force : Weight :: Upward force offered by liquid : _____.
