An object is 14.0 cm to the left of a converging lens of 8.0 cm focal length.
A second lens is positioned 10.0 cm to the right of the
first lens and is observed to form a final image at the
position of the original object.
(a) What is the focal length of the second lens ? [4 marks ]
(b) What is the overall magnification of this system?
(4 marks]
(c) State the characteristics of the final image.
[2 marks]
(d) Draw the ray diagram of the system of lenses using a
graph paper.
(4 marks]

At a certain instant after jumping from the airplane a, a skydiver b is in the position shown and has reached a terminal (constant) speed vb = 52 m/s. the airplane has the same constant speed va = 52 m/s, and after a period of level flight is just beginning to follow the circular path shown of radius ρa = 2330 m. (a) determine the velocity and acceleration of the airplane relative to the skydiver. (b) determine the time rate of change of the speed vr of the airplane and the radius of curvature ρr of its path, both as observed by the nonrotating skydiver.