What is the escape velocity from a red giant with a mass of 1msun and a radius of 150 rsun ?

If the force applied to an object remains constant, is more power needed for the object to move faster ? explain

Which of the following correctly describes what happens when an atomic bomb explodes? small pieces of fissionable material are joined and form a body with a mass greater than the critical mass, the relative number of neutrons escaping decreases, and a chain reaction and explosion result. large pieces of fissionable matter are brought together quickly and form a body with a mass smaller than the critical mass, the relative number of escaping neutrons increases, and a chain reaction and explosion result.

What is the force that opposes motion and works against the downward pull? a) friction b) gravity c) weight d) acceleration