A concave mirror of focal length 20 cm moves right at 3 cm/s. An object 30 cm to its left moves right at 7 cm/s. If the image relative to the mirror moves left at 16 cm/s, find its signed ground velocity in cm/s, taking right positive.
A concave mirror of focal length 20 cm moves right at 3 cm/s. An object 30 cm to its left moves right at 7 cm/s. If the image relative to the mirror moves left at 16 cm/s, find its signed ground velocity in cm/s, taking right positive.