Q7 an open .. level A of 4 volume contains an oil which w'eight 30.2 kN. Determine the specific gravity of the Oil.
4. barometer reads 75 cm in a stationary lift. What reading does it show when the lift is m
The diameter of the piston P2 50 cm and that of the piston Pl is 10 cm. What is the force exerted on p
downwards, with an acceleration of 1 m/s ?
The area of cttN-section of wider tube is 800 cm2. If a mass of 16 kg is placed on the massless piston,
V.
difference in the level of water in the two tubes.
6
7. An open U-tube of uniform cross-section contains mercury. When 27.2 cm of
water column is poured into one limb of the tube, how high does the mercury
rise in the other limb from its initial level [pw
= 1 = 13.6]
Initial leve
A certain block weighs 15N in air, it weighs 12N when immersed in water. When immersed in another liquid, it
weighs 13N, calculate the relative density of (i) the block (ii) the other liquid.
5.0 BUOYANCY AND ARCHIMEDES' PRINCIPLE
5.1 Buoyant Force
If a body is partially or wholly immersed in a fluid, it experiences an upward force due to the fluid surro
it. This phenomenon of force exerted by fluid on the body is called buoyancy and force is called buo
or upthrust(Th).
