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Erw Trjerth
Subject: Physics
, asked on 18/3/18
Solve this:
Q. Find the percentage decrease in weight of a body when taken 16 km below the surface of earth.
Answer
1
Erw Trjerth
Subject: Physics
, asked on 18/3/18
Q A body weighs 63 N on the surface of earth . What is the gravitational force on it due to the earth at a height equal to half the radius of earth?
Answer
1
Shivam Desale
Subject: Physics
, asked on 18/3/18
Q A particle starts from rest at a distance R from the centre and along the axis of
a fixed ring of radius R & mass M. Its velocity at the centre of the ring is:
A
)
2
G
M
R
B
)
2
G
M
R
C
)
1
-
1
2
G
M
R
D
)
2
-
2
G
M
R
Answer
1
Erw Trjerth
Subject: Physics
, asked on 18/3/18
Experts please answer the questions completely. And no links please.
Answer
1
Monish Preetam
Subject: Physics
, asked on 17/3/18
Find the velocity of escape at the moon given that its radius is 1.7 x 10^6 m and the value of g at its surface is 1.63 m/s^2
Answer
2
Monish Preetam
Subject: Physics
, asked on 17/3/18
↵What is the escape velocity for a rocket on the surface of Mars? Mass of mars = 6.58 x 10^23 kg and radius of Mars = 3.38 x 10^6 m. li.li1 {margin: 0.0px 0.0px 0.0px 0.0px; font: 14.0px 'Arial Narrow'; color: #000000; -webkit-text-stroke: #000000} span.s1 {-webkit-text-stroke: 0px #000000} span.s2 {font-kerning: none} ol.ol1 {list-style-type: decimal}
Answer
1
Archit Anand K.p.
Subject: Physics
, asked on 15/3/18
A spherical hollow cavity is made in a lead sphere of radius R, such that its surface touches the outside surface of the lead sphere and passes through its centre. The mass of the sphere before hollowing was M. With what gravitational force will the hollowed-out lead sphere attract a small sphere of mass 'm', which lies at a distance d from the centre of the lead sphere on the straight line connecting the centres of the spheres and that of the hollow, if d = 2R:
Answer
1
Ipsita Dash
Subject: Physics
, asked on 15/3/18
Time period of revolution of a satellite around the earth is T. How will the time period be effected if the
a) Mass of the satellite is made four times ?
Answer
1
Archit Anand K.p.
Subject: Physics
, asked on 15/3/18
gravitational field in a region is given by E=(3i-4j) N/kg.Find out the work done in moving a mass of 1kg by 1m along the line 4y=3x+9
Answer
1
Shivam Desale
Subject: Physics
, asked on 15/3/18
Solve this:
Q.3. Find the potential energy of the gravitational interaction of a point mass
m
and
a
thin uniform rod of mass
m
and length
l
, If they are located along a straight line at a distance a from each other.
Answer
1
Shivam Desale
Subject: Physics
, asked on 15/3/18
Solve this:
Q.5.
A particle of mass
m
is placed at the centre of curvature of fixed, uniform semi-circular ring of radius
R
and mass
M
. Calculate the interaction force between the ring and the particle.
Answer
1
Ipsita Dash
Subject: Physics
, asked on 14/3/18
Time period of revolution of a satellite around the earth is T. How will the time period be effected if the
a) mass of the satellite is made four times ?
b) orbital radius is made four times ?
Answer
1
Rohit Singh
Subject: Physics
, asked on 14/3/18
The radius of the earth is 6*10^9.at what distance from the centre of earth the weight of the body become half
Answer
1
Dhruvik Tandel
Subject: Physics
, asked on 12/3/18
state and explain princple of moments of rotational eqiulibrium
Answer
1
Naga Nandhini
Subject: Physics
, asked on 9/3/18
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.
(ii) Two uniform solid spheres of radii R and 2R are at rest with their spheres touching. Determine the gravitational force of attraction between them, if the density of spheres be p.
OR
i) Deduce an expression for the obital velocity of a satellite in the orbit. Reduce into an orbit close to the surface of the earth. How is it related to escape velocity?
ii) Determine the gravitational pull between a sphere of mass M and a uniform rod of length L and mass m as shown in the figure given below:-
Answer
1
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What are you looking for?
Q. Find the percentage decrease in weight of a body when taken 16 km below the surface of earth.
a fixed ring of radius R & mass M. Its velocity at the centre of the ring is:
a) Mass of the satellite is made four times ?
Q.3. Find the potential energy of the gravitational interaction of a point mass m and a thin uniform rod of mass m and length l, If they are located along a straight line at a distance a from each other.
Q.5. A particle of mass m is placed at the centre of curvature of fixed, uniform semi-circular ring of radius R and mass M . Calculate the interaction force between the ring and the particle.
a) mass of the satellite is made four times ?
b) orbital radius is made four times ?
(ii) Two uniform solid spheres of radii R and 2R are at rest with their spheres touching. Determine the gravitational force of attraction between them, if the density of spheres be p.
OR
i) Deduce an expression for the obital velocity of a satellite in the orbit. Reduce into an orbit close to the surface of the earth. How is it related to escape velocity?
ii) Determine the gravitational pull between a sphere of mass M and a uniform rod of length L and mass m as shown in the figure given below:-