Advertisements
Advertisements
Question
A vessel contains water up to a height of 1.5 m. Taking the density of water 103 kg m-3, acceleration due to gravity 9.8 m s-2 and area of base of vessel 100 cm2, calculate: (a) the pressure and (b) the thrust at the base of vessel.
Advertisements
Solution
Given height , h = 1.5 m
Density of water , ρ = 103 kgm-3
Acceleration due to gravity , g = 9.8 m/s2
Area of base of the vessel , a = 100 cm2 = `100 xx 10^-4 "m"^2`
(a) Pressure , P = hρg
or , P = `1.5 xx 10^3 xx 9.8`
or , P = `1.47 xx 10^4 "Nm"^-2`
(b) Thrust = Pressure × area
or , thrust = `1.47 × 10^4 × 100 × 10^-4` N
or , thrust = 147 N
RELATED QUESTIONS
Name the force which makes heavy objects appear light when immersed in a liquid.
Define buoyant force. Name two factors on which buoyant force depends.
When a boat is partially immersed in water, it displaces 600 kg of water. How much is the buoyant force acting on the boat in newtons ? (g = 10 m s-2)
Which of the following will sink or float on water? (Density of water = 1 g Cm-3)
body C having density 1100 kg m-3
Differentiate between thrust and pressure.
A tall vertical cylinder filled with water is kept on a horizontal table top. Two small holes A and B are made on the wall of the cylinder, A near the middle and B just Below the free surface of water. State and explain your observation.
Complete the following sentence :
Pressure at all points at the same depth is ....................
What do you understand by the term upthrust of a fluid? Describe an experiment to show its existence.
Describe an experiment to show that a body immersed in a liquid appears lighter than it really is.
Salt water provides less buoyant force than freshwater.
