|
Does the concentration of the earth's mass near its centre
|
|
1
|
1395
|
December 24, 2016
|
|
The acceleration due to gravity on a planet is 1.96 ${{ms}^{-2}}$
|
|
1
|
2232
|
December 24, 2016
|
|
Why a tennis ball bounces higher on hills than in plains?
|
|
0
|
1123
|
December 24, 2016
|
|
A satellite is in an elliptic orbit around the earth with aphelion of 6R and perihelion of 2R
|
|
1
|
4516
|
December 24, 2016
|
|
Earth's orbit is an ellipse with eccentricity 0.016
|
|
1
|
1339
|
December 24, 2016
|
|
A comet orbits the sun in highly elliptical orbit
|
|
1
|
2054
|
December 24, 2016
|
|
A mass M is broken into two parts, m and (M - m)
|
|
1
|
2507
|
December 24, 2016
|
|
Imagine what would happen if the value of G becomes
|
|
1
|
1306
|
December 24, 2016
|
|
A star 2.5 times the mass of the sun and collapsed to a size of 12 km rotates with a speed of 1.5 rev. per second
|
|
1
|
2516
|
August 20, 2016
|
|
(i) Define escape velocity
|
|
1
|
23644
|
August 20, 2016
|
|
A rocket is fired vertically with a speed of 5 km-${{s}^{-1}}$ from file earth's surface. How far from file earth does file rocket go before returning to the earth?
|
|
0
|
2023
|
August 20, 2016
|
|
At what distance from the earth's centre?
|
|
1
|
505
|
August 20, 2016
|
|
A comet orbits the sun in a highly elliptical orbit Does the comet have a constant:
|
|
1
|
3006
|
August 20, 2016
|
|
What is binding energy of a satellite?
|
|
0
|
9992
|
August 20, 2016
|
|
Why does moon have no atmosphere?
|
|
0
|
28000
|
August 20, 2016
|
|
If an earth satellite moves to a lower orbit there is some dissipation of energy and yet its speed increases. Explain
|
|
0
|
2235
|
August 20, 2016
|
|
A body is taken from the centre of the earth to the moon. What will be the changes in the weight of thebody?
|
|
0
|
6423
|
August 20, 2016
|
|
Generally the path of a projectile from the surface of earth is parabolic but it is elliptical for projectiles going to a very great height Why?
|
|
0
|
1312
|
August 20, 2016
|
|
What are the conditions under which a rocket fired from the earth, launches an artificial satellite of earth?
|
|
0
|
2854
|
August 20, 2016
|
|
Derive an expression for the gravitational potential energy above the surface of earth
|
|
0
|
14660
|
August 20, 2016
|
|
Find the moment of inertia of a disc about a tangent to the disc perpendicular to its plane
|
|
0
|
18894
|
August 20, 2016
|
|
As you have learnt in the text, a -geostationary satellite orbits the earth at a height of nearly 36,000 km from the surface of the earth
|
|
1
|
1378
|
August 20, 2016
|
|
Two heavy spheres each of mass 100 kg and radius 0.10 m are placed 1.0 m apart on a horizontal table
|
|
1
|
3370
|
August 20, 2016
|
|
How much energy must be expanded?
|
|
1
|
456
|
August 20, 2016
|
|
Escape velocity of projectile on a planet's surface is 11.2 km ${{s}^{-1}}$. If a body is projected at double the speed, find its speed at an infinite distance from the planet
|
|
0
|
1702
|
August 20, 2016
|
|
Assuming the earth to be a sphere of uniform mass density, how much would a body weight half way down to the centre of earth, if it weighed 250 N on the surface?
|
|
0
|
11536
|
August 20, 2016
|
|
A body weight 63 N on the surface of earth. What is the gravitational force on it due to die earth at a height equal to half the radius of earth?
|
|
0
|
7135
|
August 20, 2016
|
|
A satum year is 29.5 times the earth year. How far is the satum from the sun if the earth is 1.5 x ${{10}^{8}}$ km away from the sun?
|
|
0
|
453
|
August 20, 2016
|
|
How will you weight the sun, i.e., estimate its mass?
|
|
1
|
3024
|
August 20, 2016
|
|
Which of the following symptoms likely to afflict an astronaut in space (a) swollen feet, (b) swollen face, (c) headache, (d) orientation problem
|
|
0
|
1626
|
August 19, 2016
|