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JEE Main Physics question

PhysicsMotion in a Straight LineJEE Main

A balloon is at a height of 81 m and is ascending upwards with a velocity of 12 ms. A body of 2 kg weight is dropped from it. If ms, the body will reach the surface of the earth in

Answer: (C)

Solution

Taking up positive: 5t^25t^2$-12t-81=0⇒

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Question ID VK-152093