Question Text
Question 1 :
Kepler's second law regarding constancy of aerial velocity of a planet is a consequence of the law of conservation of
Question 2 :
{tex} {3} {/tex} particles each of mass {tex} m {/tex} are kept at vertices of an equilateral triangle of side {tex} L {/tex}. The gravitational field at centre due to these particles is<br>
Question 3 :
According to Kepler's law the time period of a satellite varies with its radius as
Question 4 :
Kepler's second law (law of areas) is nothing but a statement of
Question 5 :
The escape velocity for a body projected vertically upwards from the surface of earth is {tex} 11 \mathrm { km } / \mathrm { s } {/tex}. If the body is projected at an angle of {tex} {45} {/tex} with the vertical, the escape velocity will be
Question 6 :
In planetary motion the areal velocity of position vector of a planet depends on angular velocity {tex} ( \omega ) {/tex} and the distance of the planet from sun ( {tex} r {/tex} ). If so the correct relation for areal velocity is
Question 7 :
The weight of an astronaut, in an artificial satellite revolving around<br>the earth, is<br>
Question 8 :
If radius of earth is {tex} R {/tex} then the height {tex} 'h'{/tex} at which value of {tex} ^ { \prime } g ^ { \prime } {/tex} becomes one-fourth is
Question 9 :
The orbital speed of an artificial satellite very close to the surface of the earth is {tex} V _ { o } . {/tex} Then the orbital speed of another artificial satellite at a height equal to three times the radius of the earth is
Question 10 :
The mass of the earth is {tex}\mathrm {81} {/tex} times that of the moon and the radius of the earth is {tex}\mathrm {3.5} {/tex} times that of the moon. The ratio of the escape velocity on the surface of earth to that on the surface of moon will be<br>