IIT JEE - 02
Q. A thief is running away in a car with velocity of 20 m/s. A police jeep is following him, which is sighted by thief in his rear view mirror, which is a convex mirror of focal length 10 m. He observes that the image of jeep is moving towards him with a velocity of 1 cm/s. If the magnification of mirror for the jeep at that time is 1/10, Find :
a) the actual speed of jeep,
b) rate at which magnification is changing.
Assume the police jeep is on axis of the mirror.
IIT JEE - 02
Q. A thief is running away in a car with velocity of 20 m/s. A police jeep is following him, which is sighted by thief in his rear view mirror, which is a convex mirror of focal length 10 m. He observes that the image of jeep is moving towards him with a velocity of 1 cm/s. If the magnification of mirror for the jeep at that time is 1/10, Find :
a) the actual speed of jeep,
b) rate at which magnification is changing.
Assume the police jeep is on axis of the mirror.
Mainak Chakraborty , 14 Years ago
Grade Upto college level
