Physics Exercises/Gravity


 * 1) If ve and vo denotes the escape velocity and orbital velocity of a satellite corresponding to a circular orbit of radius R, then
 * 2) $$v_e=v_o$$
 * 3) $$v_e=1.74 \times v_o$$
 * 4) $$v_e=v_o/1.74$$
 * 5) $$v_e$$ and $$v_o$$ are not related
 * 6) the orbital traced by planet around a star is in general
 * 7) a circle
 * 8) an ellipse
 * 9) a parabola
 * 10) a straight line
 * 11) 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
 * 4T
 * 1) T/8
 * 2) T/4
 * 8T
 * 1) A satellite is moving around the earth in a circular orbit.Which of the following statement is correct
 * 2) it is moving with a constant speed
 * 3) it is falling freely towards earth
 * 4) its velocity keeps on increasing
 * 5) it is falling freely towards the earth its velocity keeps on increasing
 * 6) a satellite is revolving round the earth in a circular orbit of radius R. work done by gravitational force in one revolution is
 * 7) zero
 * 8) $$2mgR^2$$
 * 9) $$mgR^2$$
 * 10) $$mgR$$
 * 11) What is the pressure in the center of the Earth assuming the constant density.