Solve the following examples / numerical problems:
The time taken by the earth to complete on revolution around the Sun is 3.156 xx 10^7 s. The distance between the earth and the sun is 1.5 xx 10^11 m . Find the speed of revolution of the earth.

Solve the following examples / numerical problems: The mass of the earth is 6xx10^24 kg. The distance between the earth and the sun is 1.5xx10^11m. If the gravitational force between the two is 3.5xx 10^22 N, what is the mass of the Sun ? ( use G =6.7xx 10^-11 Nm^-2kg^-2)

If the distance between the earth and sun becomes 1/4 ^(th) , then its period of revolution around the sun will become

Solve the following examples / numerical problems: The masses of the earth and the moon are 6 xx 10^24 kg and 7.4 xx 10^22 kg, respectively. The distance between them is 3.84 xx 10^5 km. Calculate the gravitational force of attraction between the two use G = 6.7 xx 10^-11 N-m^2 kg^-2.

Solve the following examples/numerical problems : If the height of a satellite completing one revolution around the earth in T seconds in h meters , then what would be the height of a satellite taking 2 √2 T seconds for one revolutions?

Solve the following examples / numerical problems: Assuming that the earth performs uniform circular motion around the Sun, find the centripetal acceleration of the earth. [Speed of the earth =3 xx10^4 m/s, distance between the earth and the Sun= 1.5xx10^11 m]

Solve the following examples / numerical problems: The mass of a planet is four times that of the earth and its radius is double the radius of the earth. The escape velocity of a body from the earth is 11.2xx10^3 m/s. Find the escape velocity of a body from the planet.

Solve the following examples / numerical problems: Find the magnitude of the acceleration due to gravity at the surface of the earth. ( M= 6xx 10^24 kg, R= 6400 km)

Solve the following examples/ numerical problems:(c=3xx10^8 m/s) The speed of light in a transparent medium is 2.4 xx10^8 m/s. Calculate the absolute refractive index of the medium.

Solve the following examples: (numerical problems) A body of mass 10 kg moves with a velocity of 5 m/s. Find its momentum.

Solve the following examples / numerical problems: Find the magnitude of the gravitational force between the Sun and the earth.( Mass of the Sun =2xx10^30 kg, mass of the earth = 6xx10^24 kg and the distance between the centres of the Sun and the earth = 1.5xx 10^11 m, G =6.67 xx10^-11 N-m^2 /kg^2 ).