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Ian Colaco
Subject: Physics
, asked on 13/2/18
Derive acceleration due to gravity at depth d. (3marks)
Answer
1
Ian Colaco
Subject: Physics
, asked on 13/2/18
Derive acceleration due to gravity at height h. (3 marks)
Answer
1
Mohit Jeswani
Subject: Physics
, asked on 12/2/18
to increase the time period of a satellite double how much will you need to increase its orbiting radius
Answer
1
Ipsita Dash
Subject: Physics
, asked on 12/2/18
Ashok asked his father about remote sensing satellites which are used to get information of places which can't be reached directly.
a) What values do you associate with Ashok ?
b) A remote sensing satellite of the earth in a circular orbit at a height of 400km above the surface of earth.
1. What is the orbital speed and period of revolution of satellite ? What kind of orbit does remote sensing satellite follow ?
Answer
1
Ian Colaco
Subject: Physics
, asked on 9/2/18
What is conservative force? prove that gravitation force is conservative while frictional force is non-conservative. ( 5 marks).
Answer
1
Ian Colaco
Subject: Physics
, asked on 9/2/18
What is escape velocity? Obtain an expression for the escape velocity on the earth. Explain why there is no atmosphere on moon. (5 marks)
Answer
1
Yash Sen
Subject: Physics
, asked on 25/1/18
I couldn't understand the marked area...
A body is projected vertically upwards from
the surface of the earth with a velocity equal
to half the escape velocity the maximum
height attained by the body is (Radius of
earth = 6400 km)
(A) 3240 km
(B) 12800 km
(C) 2133 km
(D) 6400 km
Solution
Using the law of conservation of energy, we
have
1
2
m
V
e
2
2
-
G
M
m
R
=
-
G
M
m
R
+
H
Answer
3
Shreya Choudhary
Subject: Physics
, asked on 25/1/18
a projectile is projected with velocity 2/3Ve in vertically upward direction from ground into space then height covered
Answer
1
Shreya Choudhary
Subject: Physics
, asked on 25/1/18
object feel weightlessness at equator of earth when angular speed becomes 5 x or 15 x or 17 x or 25 x.
Answer
1
Shreya Choudhary
Subject: Physics
, asked on 24/1/18
two particles having mass 4 kg and 9 kg are placed at a distance of 16 cm from each other where should the particle of mass 5 kg be placed on the line joining them so that the net force on 5 kg is zero
Answer
1
Nura Mohammad
Subject: Physics
, asked on 20/1/18
At what height will a person weighing 80 kgwt will weigh 20 kgwt
Answer
1
Tulsi Mehta
Subject: Physics
, asked on 19/1/18
When to use g' =g (1-2h/r) and g' =g (r/r+h)^2 ?
Answer
1
Tulsi Mehta
Subject: Physics
, asked on 17/1/18
is it possible to place a satellite , so that it is always over new delhi ? Why?
Answer
1
Tulsi Mehta
Subject: Physics
, asked on 17/1/18
Relation between g and angular velocity omega.
g- R omega^2 cos^2 alpha.
Plz explain this.
Answer
1
Tulsi Mehta
Subject: Physics
, asked on 17/1/18
THE ANSWER GIVEN IN BOOK IS "both have same speed root gR. "
PLZ EXPLAIN HOW.
2 artificial satellites one close to the earth and other away are revolving around the earth. Which of them has larger speed ?
Answer
1
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What are you looking for?
a) What values do you associate with Ashok ?
b) A remote sensing satellite of the earth in a circular orbit at a height of 400km above the surface of earth.
1. What is the orbital speed and period of revolution of satellite ? What kind of orbit does remote sensing satellite follow ?
A body is projected vertically upwards from
the surface of the earth with a velocity equal
to half the escape velocity the maximum
height attained by the body is (Radius of
earth = 6400 km)
(A) 3240 km
(B) 12800 km
(C) 2133 km
(D) 6400 km
Solution
Using the law of conservation of energy, we
have
g- R omega^2 cos^2 alpha.
Plz explain this.
PLZ EXPLAIN HOW.
2 artificial satellites one close to the earth and other away are revolving around the earth. Which of them has larger speed ?