Physics Exercises/Gravity

From Wikibooks, open books for an open world
Jump to: navigation, search
  1. If ve and vo denotes the escape velocity and orbital velocity of a satellite corresponding to a circular orbit of radius R, then
    1. and are not related
  2. the orbital traced by planet around a star is in general
    1. a circle
    2. an ellipse
    3. a parabola
    4. a straight line
  3. the period of a satellite in a circular orbit of radius R is T.What is the period of another satellite in a circular orbit of radius 4R
    1. 4T
    2. T/8
    3. T/4
    4. 8T
  4. A satellite is moving around the earth in a circular orbit.Which of the following statement is correct
    1. it is moving with a constant speed
    2. it is falling freely towards earth
    3. its velocity keeps on increasing
    4. it is falling freely towards the earth its velocity keeps on increasing
  5. a satellite is revolving round the earth in a circular orbit of radius R. work done by gravitational force in one revolution is
    1. zero
  6. What is the pressure in the center of the Earth assuming the constant density.