To an astronaut in a space-ship, the earth appears :

What will be the mass of an astronaut in a space satellite if at earth's surface the astronaut weighs 250 N ? (Take g = 10 ms^(-2) )

An astronaut orbiting in a spaceship round the earth, has centripetal acceleration 2.45m//s^(2) . Find the height of the spaceship. (Take R = 6400 km).

Green algae are also included among the items carried by astronauts in a space ship Which of the following are the reasons for this? 1. These being very simple plants, are amenable to a variety of experiments. 2. These may provide nourishment to the persons on the space ship. 3. These act as a source of oxygen. Select the correct answer using the codes given below.

An astronaut inside a small spaceship orbitting around the earth cannot detect gravity. If the space station orbtitting around the earth has a large size, can he hope to detect gravity ?

Two astronauts A and B connected with a rope stay stationary in free space relative to their spaceship. Mass of A is more than that of B and the rope is straight. Astronaut A statas pulling the rope but astronaut B does not. If you were the third astronaut in the spaceship, what do you observe?

Assertion : An astronaut in an orbiting space station above the earth experience weightlessness. Reason : An object moving around the earth under the infuence of earth's gravitational force is in a state of 'free fall'

A cord of length 64 m is used to connected a 100 kg astronaut to spaceship whose mass is much larger than that of the astronuat. Estimate the value of the tension in the cord. Assume that the spaceship is orbiting near earth surface. Assume that the spaceship and the astronaut fall on a straight line from the earth centre. the radius of the earth is 6400 km .

The maximum vertical distance through which an astronaut can jump on the earth is 0.5 m. Estimate the corresponding distance on the moon.

A space-ship is launched into a circular orbit close to the Earth,s surface. What additional speed should now be imparted to the spaceship so that it overcome the gravitational pull of the Earth. Take kinetic energy of the space-ship, K = total energy of space-ship = (GMm)/(2R) where m = mass of space-ship, M= mass of the earth and R = radius of the earth.

An astronaut. inside an earth satellite, experiences weightlessness because