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Class 11
Science
Physics
Gravitation
From a solid sphere of mass M and radius R, a spherical portion of radius R/2 is removed, as shown in the figure Taking gravitational potential
V
=
0
a
t
r
=
∞
, the potential at (G = gravitational constatn)
(a)
3
R
−
2
G
M
(b)
R
−
2
G
M
(c)
2
R
−
G
M
(d)
R
−
G
M
Correct answer:
(d)
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Imagine a body that is completely submerged in water, but whose depth of submergence can be varied. In which case does it experience a larger upthrust, when it is submergged deep or shallow?
Dependence of intensity of gravitational field
(
E
)
of earth with distance
(
r
)
from centre of earth is correctly represented by
What will be the formula of the mass in terms of g,R and G ? (R = radius of the earth)
Buoyant Force is the upward force that acts in the direction opposite to that of weight.
Type 1 for true and 0 for false
In what direction does the buoyant force on an object immersed in a liquid act?
A satellite moves around the earth in a circular orbit with speed
v
. If
m
is the mass of the satellite, its total energy is
A body of density
ρ
is immersed in a liquid of density
ρ
L
. State condition when the body will
State whether the following statements are true or false:
(a) The buoyant force depends on the nature of object immersed in the liquid
(b) 'Archimedes' principle can also be applied to gases.
Imagine a body that is completely submerged in water, but whose depth of submergence can be varied. In which case does it experience a larger upthrust, when it is submergged deep or shallow?
Dependence of intensity of gravitational field
(
E
)
of earth with distance
(
r
)
from centre of earth is correctly represented by
What will be the formula of the mass in terms of g,R and G ? (R = radius of the earth)
Buoyant Force is the upward force that acts in the direction opposite to that of weight.
Type 1 for true and 0 for false
In what direction does the buoyant force on an object immersed in a liquid act?
A satellite moves around the earth in a circular orbit with speed
v
. If
m
is the mass of the satellite, its total energy is
A body of density
ρ
is immersed in a liquid of density
ρ
L
. State condition when the body will
State whether the following statements are true or false:
(a) The buoyant force depends on the nature of object immersed in the liquid
(b) 'Archimedes' principle can also be applied to gases.
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