Answer
a) The image is smaller than the object, and it is possible to "see your full body in 10 cm" in a diverging mirror.
b) As the ball swings towards the mirror and approaches the focal point, the image enlarges. An enlarged image appears to be closer to our eyes and it appears to move toward the observer, therefor, it produces the effect of appearing to jump out of mirror as the ball swings through the focal point.
Work Step by Step
a) The image is smaller than the object, and it is possible to "see your full body in 10 cm" in a diverging mirror.
b) As the ball swings towards the mirror and approaches the focal point, the image enlarges. An enlarged image appears to be closer to our eyes and it appears to move toward the observer, therefor, it produces the effect of appearing to jump out of mirror as the ball swings through the focal point.