In order to form a real image using a concave mirror, the object must be placed beyond the center of curvature of the mirror. Therefore, the object must be further from the mirror than the focal point. The image that will form will be real, but it will also be inverted and its magnification will be less than 1, meaning it will be smaller than the actual object.
Heat is the answer but I need to use 20 characters to post :)
B)
The speed of the cart changed because it stopped.
Hope I could help!
-Marshy
