NCERT Solutions
Board Paper Solutions
Ask & Answer
School Talk
Login
GET APP
Login
Create Account
Popular
Latest
Priyanshi
Subject: Physics
, asked on 4/1/18
And the question with solution
2. If three particles each of mass M are placed at the three corners of an equilateral triangle of side a, the forces exerted by this system on another particle of mass M placed (i) at the mid-point of a side and (ii) at the centre of the triangle are respectively:
(
a
)
0
,
4
G
M
2
3
a
2
b
4
G
M
2
3
a
2
,
0
c
3
G
M
2
a
2
,
G
M
2
a
2
(
d
)
0
,
0
Answer
1
Vanshika Sharma
Subject: Physics
, asked on 4/1/18
Solve this:
Q. A disc of mass m and radius 'R' is attached to a rectangular plate of the same mass breadth R and length 2R as shown in the figure. Find the moment of inertia of this system about the axis XX' passing through the centre of the disc and along the plane.
Answer
1
Vanshika Sharma
Subject: Physics
, asked on 4/1/18
Solve this:
Q. Two isolated point masses m and M are separated by a distance
l
. The moment of inertia of the system about an axis passing through a point where gravitational field is zero and perpendicular to the line joining the two masses, is
A
m
2
+
M
2
m
+
M
2
l
2
B
m
+
M
m
+
M
l
2
C
m
+
M
m
+
M
2
l
2
D
none
of
the
above
Answer
1
Krithikha B
Subject: Physics
, asked on 3/1/18
one of the satellites of Jupiter, has an orbital period of 1.769 days and the radius of the orbit is 4.22 × 108 m. Show that the mass of Jupiter is about onethousandth that of the sun.
Answer
1
Vanshika Sharma
Subject: Physics
, asked on 2/1/18
A spherical mass is scooped out from a solid of radius R. The distance between the cavity and centre of sphere is
x
. The gravitational field inside the cavity is
(A) zero
(B) uniform in direction and constant in magnitude
(C) non-uniform
(D) uniform in direction and variable in magnitude
Answer
1
Naga Nandhini
Subject: Physics
, asked on 31/12/17
26. (i) Give the expressions for the gravitational force exerted by the earth on a point mass m located above, below and on the surface of earth. Hence, deduce the expression for g on earth's surface.
Answer
1
Naga Nandhini
Subject: Physics
, asked on 31/12/17
Why the gravitational force decreases towards equator and increases at poles?
Answer
1
Mailbeena
Subject: Physics
, asked on 28/12/17
A satellite is revolving in a circular path close to a planet of density find expression for its periods of revolution
Answer
1
Sudipan
Subject: Physics
, asked on 25/12/17
Gravitational field at the centre of a semicircle formed by a thin wire AB of mass M and length
l
is
(a)
G
M
l
2
along
x
-
axis
(b)
G
M
π
l
2
along
y
-
axis
(c)
2
π
G
M
l
2
along
x
-
axis
(d)
2
π
G
M
l
2
along
y
-
axis
Answer
1
Mansi Wadhera
Subject: Physics
, asked on 14/12/17
Is gravitational potential a scalar or a vector quantity ?
Answer
7
Mansi Wadhera
Subject: Physics
, asked on 14/12/17
Is gravitational field intensity a scalar or a vector quantity ?
Answer
1
Ranjitha R
Subject: Physics
, asked on 8/12/17
Gravitational force between two point mass of the bodies in the universe is direct to the product of the mass and inversly proportional to the square of the distance between them. explain this statement
Answer
1
Shourya Sharma
Subject: Physics
, asked on 4/12/17
Why area swept by the planet=ΔA=1/2(r cross vΔt)
Answer
1
Aditya
Subject: Physics
, asked on 25/11/17
Three equal masses of 1.5 kg each are fixed at the vertices of a equilateral triangle of side 1m .What is the force acting on the particle of mass 1kg placed at its centroid ?
Answer
2
Subhashree Ray
Subject: Physics
, asked on 24/11/17
If the distance between Earth and sun were half of its present value, then how many number of days will be there in a year
Answer
1
Prev
6
7
8
9
10
Next
What are you looking for?
2. If three particles each of mass M are placed at the three corners of an equilateral triangle of side a, the forces exerted by this system on another particle of mass M placed (i) at the mid-point of a side and (ii) at the centre of the triangle are respectively:
Q. A disc of mass m and radius 'R' is attached to a rectangular plate of the same mass breadth R and length 2R as shown in the figure. Find the moment of inertia of this system about the axis XX' passing through the centre of the disc and along the plane.
Q. Two isolated point masses m and M are separated by a distance . The moment of inertia of the system about an axis passing through a point where gravitational field is zero and perpendicular to the line joining the two masses, is
(A) zero
(B) uniform in direction and constant in magnitude
(C) non-uniform
(D) uniform in direction and variable in magnitude
(a) (b)
(c) (d)