The rear view mirror of a car is a plane mirror.A driver is reversing his car at a speed of 2m/s.The driver sees in his rear view mirror,the image of a truck parked behind his car. What will be the speed at which the image of the truck appears to approach the driver? Please solve!

Question

egenriether · Answer

What have you worked out so far?

maheshmeghwal9 · Answer

I don't have any idea about the question that how to solve it?

egenriether · Answer

Well, a plane mirror means that objects in the mirror appear the same distance away as they would if you were looking at them.  So If the truck in the mirror looks 10 meters away, then it is 10 meters away.  (Some mirrors are not like this).  So if distances are the same in the mirror, then so are speeds.

maheshmeghwal9 · Answer

k! then.

maheshmeghwal9 · Answer

Ans...... is {4m/s}.

experimentx · Answer

|dw:1336408470312:dw|
The mirror is moving at 2 m/s with respect to truck
the image is moving at 2 m/s with respect to mirror.
the image is moving at 4 m/s with respect to object.