Physics questions
20027 published questions with worked solutions.
- If is the mean density of the earth and R is its radius, then critical speed of a satellite revolving very close to the surface...
- What would be the duration of the year, if the distance between the earth and the sun gets doubled?
- The period (T) of an artificial satellite of earth depends on the density of the earth (assumed constant) as:
- The gravitational potential energy of a body at a distance r from center of the earth is e, then its weight at that point is:
- The escape velocity of a body from the surface of planet whose density is 5.46 10^ 15 kg/m^3 is 11.2 km/sec the escape velocity...
- A satellite is orbiting round the earth at distance equal to radius earth from the surface of earth. The period of revolutions...
- A sphere of mass 40 kg is attracted by another sphere of mass 15 kg with a force of 1/10 of mfg. The center of sphere are...
- It is desired to launch a satellite at 36000 km above the earth compute the minimum speed to put the satellite in to a stable...
- The earth (mass =6 10^ 24 kg) revolves round the sun with an angular velocity of 2 10^ -7 rad/s in a circular orbit of radius 1.5...
- The weight of a body at a distance 2R from the center of the earth of radius 'R' is 2.5 N. if the distance is 3R from the center...
- The depth from the surface of the earth where acceleration due to gravity is 20% of its value on the surface of the earth is...
- If the weight of a body is 100 N on the surface of the earth then its binding energy on the surface of the earth is
- A satellite circles a planet of unknown mass in circular orbit of radius 2 10^7 m. the magnitude of the gravitational force...
- The ration of the K.E. required to be given to the satellite to escape earth's gravitational field to the K.E. required to be...
- The escape velocity of the earth is 11.2 km/s for a planet whose mass and radius are twice those of the earth, the escape...
- The escape velocity from the earth is 11.2 km/s the escape velocity from a planet having twice the radius and same mean density...
- The escape velocity from the earth is about 11.4 km/s the escape velocity from a planet having twice the radius and the twice...
- The escape velocity on the surface of the earth is 11.2km/s if mass and radius of a planet is 4 and 2 times respectively than...
- The mean radius of the earth is R, its angular speed about its own axis is and the acceleration due to gravity at earth's surface...
- The mass of the moon is (1/81) of the mass of earth and the gravitational pull is (1/6) of earth. It is due to the fact that