A point object is moving along the principle axis of a concave mirror at rest of focal length 30 cm with speed 5m/s towards the mirror. The speed of image of object when object is at a distance 60 cm from mirror is …. m/s.
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Ans. 5
Sol.
= – 
× 
= 
+ 
– 
= 
⇒ V = + 60, m = 1
= – 
= + 5 m/s
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