143207
A cube of mass $m$ and density $D$ is suspended in a liquid of density $d \lt D$ with the help of a spring of stiffness $k$. The elongation of spring is
A Given, density of liquid $=\mathrm{d}$, density of cube $=$ $\mathrm{D}$, mass of cube $=\mathrm{m}$ $\text { k.x }+F_{B}=m g$ $x=\frac{m g-F_{B}}{k}=\frac{m g-v d g}{k}$ $x=\frac{m g-\frac{m}{D} d g}{k}=\frac{m g}{k}\left[1-\frac{d}{D}\right]$
SRMJEE - 2008
Mechanical Properties of Fluids
143212
If some object is weighed when submerged in water, what will happen to its weight compared to its weight in air?
1 Increased
2 Decrease
3 Remain exactly the same
4 Increase or decrease cannot be predicted
Explanation:
B When object is submerged in water then the buoyant force act on the object in upward direction. Because of this buoyant force, the weight of the object decreases. Then, Apparent weight of object $\left(\mathrm{W}^{\prime}\right)=\mathrm{W}-\mathrm{F}_{\mathrm{b}}$ Where, $\mathrm{W}=$ Actual weight $\mathrm{F}_{\mathrm{b}}=$ Buoyant force.
NDA (II) 2017
Mechanical Properties of Fluids
143208
If there were no gravity, which of the following will not be there for a fluid?
1 Viscosity
2 Surface tension
3 Pressure
4 Archimedes' upward thrust
Explanation:
D Archimedes' principle indicates upward buoyant force exerted on body immersed in a fluid is equal to weight of fluid that the body displaces and this weight is a function of acceleration due to gravity. Hence, Archimedes' upward thrust will be absent for a fluid, if there were no gravity.
Karnataka CET-2006
Mechanical Properties of Fluids
143210
A plastic tube containing few stones is floating in a tank of water. If the stones are unloaded, the water level
1 remains same
2 rises
3 falls
4 rises or falls depending on the number of stones unloaded
Explanation:
C A plastic tube containing few stones is floating in a tank of water. If the stones are unloaded the water level falls.
143207
A cube of mass $m$ and density $D$ is suspended in a liquid of density $d \lt D$ with the help of a spring of stiffness $k$. The elongation of spring is
A Given, density of liquid $=\mathrm{d}$, density of cube $=$ $\mathrm{D}$, mass of cube $=\mathrm{m}$ $\text { k.x }+F_{B}=m g$ $x=\frac{m g-F_{B}}{k}=\frac{m g-v d g}{k}$ $x=\frac{m g-\frac{m}{D} d g}{k}=\frac{m g}{k}\left[1-\frac{d}{D}\right]$
SRMJEE - 2008
Mechanical Properties of Fluids
143212
If some object is weighed when submerged in water, what will happen to its weight compared to its weight in air?
1 Increased
2 Decrease
3 Remain exactly the same
4 Increase or decrease cannot be predicted
Explanation:
B When object is submerged in water then the buoyant force act on the object in upward direction. Because of this buoyant force, the weight of the object decreases. Then, Apparent weight of object $\left(\mathrm{W}^{\prime}\right)=\mathrm{W}-\mathrm{F}_{\mathrm{b}}$ Where, $\mathrm{W}=$ Actual weight $\mathrm{F}_{\mathrm{b}}=$ Buoyant force.
NDA (II) 2017
Mechanical Properties of Fluids
143208
If there were no gravity, which of the following will not be there for a fluid?
1 Viscosity
2 Surface tension
3 Pressure
4 Archimedes' upward thrust
Explanation:
D Archimedes' principle indicates upward buoyant force exerted on body immersed in a fluid is equal to weight of fluid that the body displaces and this weight is a function of acceleration due to gravity. Hence, Archimedes' upward thrust will be absent for a fluid, if there were no gravity.
Karnataka CET-2006
Mechanical Properties of Fluids
143210
A plastic tube containing few stones is floating in a tank of water. If the stones are unloaded, the water level
1 remains same
2 rises
3 falls
4 rises or falls depending on the number of stones unloaded
Explanation:
C A plastic tube containing few stones is floating in a tank of water. If the stones are unloaded the water level falls.
143207
A cube of mass $m$ and density $D$ is suspended in a liquid of density $d \lt D$ with the help of a spring of stiffness $k$. The elongation of spring is
A Given, density of liquid $=\mathrm{d}$, density of cube $=$ $\mathrm{D}$, mass of cube $=\mathrm{m}$ $\text { k.x }+F_{B}=m g$ $x=\frac{m g-F_{B}}{k}=\frac{m g-v d g}{k}$ $x=\frac{m g-\frac{m}{D} d g}{k}=\frac{m g}{k}\left[1-\frac{d}{D}\right]$
SRMJEE - 2008
Mechanical Properties of Fluids
143212
If some object is weighed when submerged in water, what will happen to its weight compared to its weight in air?
1 Increased
2 Decrease
3 Remain exactly the same
4 Increase or decrease cannot be predicted
Explanation:
B When object is submerged in water then the buoyant force act on the object in upward direction. Because of this buoyant force, the weight of the object decreases. Then, Apparent weight of object $\left(\mathrm{W}^{\prime}\right)=\mathrm{W}-\mathrm{F}_{\mathrm{b}}$ Where, $\mathrm{W}=$ Actual weight $\mathrm{F}_{\mathrm{b}}=$ Buoyant force.
NDA (II) 2017
Mechanical Properties of Fluids
143208
If there were no gravity, which of the following will not be there for a fluid?
1 Viscosity
2 Surface tension
3 Pressure
4 Archimedes' upward thrust
Explanation:
D Archimedes' principle indicates upward buoyant force exerted on body immersed in a fluid is equal to weight of fluid that the body displaces and this weight is a function of acceleration due to gravity. Hence, Archimedes' upward thrust will be absent for a fluid, if there were no gravity.
Karnataka CET-2006
Mechanical Properties of Fluids
143210
A plastic tube containing few stones is floating in a tank of water. If the stones are unloaded, the water level
1 remains same
2 rises
3 falls
4 rises or falls depending on the number of stones unloaded
Explanation:
C A plastic tube containing few stones is floating in a tank of water. If the stones are unloaded the water level falls.
143207
A cube of mass $m$ and density $D$ is suspended in a liquid of density $d \lt D$ with the help of a spring of stiffness $k$. The elongation of spring is
A Given, density of liquid $=\mathrm{d}$, density of cube $=$ $\mathrm{D}$, mass of cube $=\mathrm{m}$ $\text { k.x }+F_{B}=m g$ $x=\frac{m g-F_{B}}{k}=\frac{m g-v d g}{k}$ $x=\frac{m g-\frac{m}{D} d g}{k}=\frac{m g}{k}\left[1-\frac{d}{D}\right]$
SRMJEE - 2008
Mechanical Properties of Fluids
143212
If some object is weighed when submerged in water, what will happen to its weight compared to its weight in air?
1 Increased
2 Decrease
3 Remain exactly the same
4 Increase or decrease cannot be predicted
Explanation:
B When object is submerged in water then the buoyant force act on the object in upward direction. Because of this buoyant force, the weight of the object decreases. Then, Apparent weight of object $\left(\mathrm{W}^{\prime}\right)=\mathrm{W}-\mathrm{F}_{\mathrm{b}}$ Where, $\mathrm{W}=$ Actual weight $\mathrm{F}_{\mathrm{b}}=$ Buoyant force.
NDA (II) 2017
Mechanical Properties of Fluids
143208
If there were no gravity, which of the following will not be there for a fluid?
1 Viscosity
2 Surface tension
3 Pressure
4 Archimedes' upward thrust
Explanation:
D Archimedes' principle indicates upward buoyant force exerted on body immersed in a fluid is equal to weight of fluid that the body displaces and this weight is a function of acceleration due to gravity. Hence, Archimedes' upward thrust will be absent for a fluid, if there were no gravity.
Karnataka CET-2006
Mechanical Properties of Fluids
143210
A plastic tube containing few stones is floating in a tank of water. If the stones are unloaded, the water level
1 remains same
2 rises
3 falls
4 rises or falls depending on the number of stones unloaded
Explanation:
C A plastic tube containing few stones is floating in a tank of water. If the stones are unloaded the water level falls.
