EASY
JEE Main
IMPORTANT
Earn 100

A boat having a length 3 m and breadth 2 m is floating on a lake. The boat sinks by 1 cm, when a man gets on it. The mass of the man is

50% studentsanswered this correctly

Important Questions on Fluid Mechanics

MEDIUM
JEE Main
IMPORTANT
Complete Study Pack for Engineering Entrances Objective Physics Vol 1>Chapter 13 - Fluid Mechanics>Objective Problems>Q 5
A small block of wood of relative density 0.5 is submerged in water. When the block is released, it starts moving upwards, then the acceleration of the block is g=10 m s-2
MEDIUM
JEE Main
IMPORTANT
Complete Study Pack for Engineering Entrances Objective Physics Vol 1>Chapter 13 - Fluid Mechanics>Objective Problems>Q 6
The reading of spring balance when a block is suspended from it in air is 60 N. This reading is changed to 40 N, when the block is immersed in water. The specific gravity of the block is
MEDIUM
JEE Main
IMPORTANT
Complete Study Pack for Engineering Entrances Objective Physics Vol 1>Chapter 13 - Fluid Mechanics>Objective Problems>Q 7

A tank contains water on top of mercury as shown in the figure. A cubical block of side 10 cm is in equilibrium inside the tank. The depth of the block inside mercury is (relative density of the material of block =8.56, relative density of mercury =13.6)

Question Image

EASY
JEE Main
IMPORTANT
Complete Study Pack for Engineering Entrances Objective Physics Vol 1>Chapter 13 - Fluid Mechanics>Objective Problems>Q 8
An object of weight w and density ρ is submerged in liquid of density σ, its apparent weight will be
HARD
JEE Main
IMPORTANT
Complete Study Pack for Engineering Entrances Objective Physics Vol 1>Chapter 13 - Fluid Mechanics>Objective Problems>Q 9
A block of wood is floating on the surface of water in a beaker. The beaker is covered with a bell jar and the air is evacuated. What will happen to the block?
MEDIUM
JEE Main
IMPORTANT
Complete Study Pack for Engineering Entrances Objective Physics Vol 1>Chapter 13 - Fluid Mechanics>Objective Problems>Q 10
A solid of density D is floating in a liquid of density d. If v is the submerged volume of solid in the liquid and V is the total volume of the solid, then vV is equal to
HARD
JEE Main
IMPORTANT
Complete Study Pack for Engineering Entrances Objective Physics Vol 1>Chapter 13 - Fluid Mechanics>Objective Problems>Q 11
A metallic sphere floats in an immiscible mixture of water (density 103 kg m-3) and a liquid (density 8×103 kg m-3) such that its 23 part is in water and 13 part in the liquid. The density of the metal is
MEDIUM
JEE Main
IMPORTANT
Complete Study Pack for Engineering Entrances Objective Physics Vol 1>Chapter 13 - Fluid Mechanics>Objective Problems>Q 12
A body measures 5 N in air and 2 N when put in water. The buoyant force is