## Question

### Solution

Correct option is

2.67 hours

Radius of the earth, Re = 6400 km = 6.4 × 106 m.

Radius of the orbit of the satellite is    Period of revolution, seconds = 2.67 hours.

#### SIMILAR QUESTIONS

Q1

The radius of the earth is approximately 6000 km. What will be your weight at 6000 km above the surface of the earth? At 12000 km above? At 18000 km above?

Q2

Calculate the gravitational field strength and the gravitational potential at the surface of the moon. The mass of the moon is kg and its radius is  Q3

The intensity of gravitational field at a point situated at earth’s surface is 2.5 N/kg. Calculate the gravitational potential at that point. Given: radius of earth, Q4

At a point above the surface of the earth, the gravitational potential is and the acceleration due to gravity is 6.4 ms–2. Assuming the mean radius of the earth to be 6400 km, calculate the height of this point above the earth’s surface.

Q5

The mass of the earth is and its radius is m. How much work will be done in taking a 10-kg body from the surface of the earth to infinity? What will be the gravitational potential energy of the body on the earth’s surface? If this body falls from infinity to the earth, what will be its velocity when striking the earth? Q6

The radius of earth is 6400 km and mass is kg. What will be the gravitational potential energy of a body of 200 kg placed at a height of 600 km from the surface of the earth? Q7

A body of mass m is moved from the surface of the earth to a height (his not negligible in comparison to radius of earth Re). Prove that the increase in potential energy is Q8

Calculate the velocity of projection of a particle so that the maximum height attained by the particle is 0.5 Re, where Re is radius of earth. The mass of earth is Me.

Q9

A satellite is revolving in a circular orbit at a distance of 2620 km from the surface of the earth. Calculate the orbital velocity and the period of revolution of the satellite. Radius of the earth = 6380 km, mass of the earth = Nmkg–2

Q10

(i) A satellite is revolving in an orbit close to the earth’s surface. Taking the radius of the earth as find the value of the orbital speed and the period of revolution of the satellite. (ii) What is the relationship of this orbital speed to the velocity required to send a body from the earth’s surface into space, never to return?