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A body A is thrown vertically upwards with such a velocity that it reaches a maximum height of h. Simultaneously, another body B is dropped from height h. It strikes the ground and does not rebound. The velocity of A relative to B versus time graph is best represented by (upward direction is positive).
A. image

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Velocity of `A` at any time `= v - "gt"`
velocity of `B` at any time `= -"gt"`
`V_(AB) v ("till the B strike the ground")`
`V_(AB) =- "gt" ("For" tgt (v)/(g))`
image

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