EASY
11th Telangana Board
IMPORTANT
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A satellite orbits the earth at a height equal to the radius of the earth. Find its orbital speed in km/s. (G=6.67×10-11 Nm2kg-2, mass of earth M=6×1024 kg, radius of Earth R=6400 km) (Answer up-to three places of decimal)

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Important Questions on Gravitation

EASY
11th Telangana Board
IMPORTANT

A satellite orbits the earth at a height equal to the radius of the earth. Find its period of revolution in hours(write the value to the nearest integer).

(G=6.67×10-11 Nm2kg-2, mass of earth M=6×1024 kg, radius of Earth R=6400 km

MEDIUM
11th Telangana Board
IMPORTANT
The gravitational force of attraction between two objects decreases by 36% when the distance between them is increased by 4 m. Find the original distance (in metres) between them.
MEDIUM
11th Telangana Board
IMPORTANT
Four identical masses of m are kept at the corners of a square of side a. Find the gravitational force exerted on one of the masses by the other masses.
MEDIUM
11th Telangana Board
IMPORTANT
Two spherical balls of 1 kg and 4 kg are separated by a distance of 12 cm. The distance (in centimetres) of the point from the 1 kg mass at which the gravitational force on any mass becomes zero is x. Find the value of x
EASY
11th Telangana Board
IMPORTANT
Three uniform spheres each of mass m and radius R are kept in such a way that each touches the other two. Find the magnitude of gravitational force on any of the spheres due to the other two.
EASY
11th Telangana Board
IMPORTANT
Two satellites are revolving around the earth at different heights. The ratio of the orbital speed is 2:1. If one of them is at a height of 100 km. What is the height(in km) of other satellite ? (Radius of earth is 6400 km)
EASY
11th Telangana Board
IMPORTANT
A satellite is revolving round in a circular orbit with a speed of 8 km/s at a height where the acceleration due to gravity is 8 m/s2. How high is the satellite from the Earth's surface ? (Radius of planet =6000 km)
EASY
11th Telangana Board
IMPORTANT

Calculate the escape velocity(in km s-1) in kilometres of a body from the Earth's surface. (g=9.8 m s-2, R=6400 km)