The acceleration of the moon just before it strikes the earth in the previous question is

A spacecraft consumes more fuel in going from earth to the moon than it takes for a return trip. Comment on this statement.

The acceleration of moon with respect to earth is 0.0027ms^-2and the acceleration of an apple falling on the earth surface is about 10ms^-2_. Assume that the radius of the moon is one fourth of the earth’s radius. If the moon is stopped for an instant and then released, it will fall towards the earth. The initial acceleration of the moon towards the earth will be

Suppose the acceleration due to gravity at the earth’s surface is 10 ms^-2 and at the surface of Mars it is4.0 ms^-2. A 60 Kg passenger goes from the earth to the Mars in a spaceship moving with a constant velocity. Neglect all other objects in sky. Which part of figure (11-Q1) best represents the weight (net gravitational force) of the passenger as a function of time?

Consider a planet in some solar system which has a mass double the mass of the earth and density equal to the average density of the earth. An object weighing W on the earth will weigh