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A particle is projected upwards with vel...

A particle is projected upwards with velocity `20m//s`. Simultaneously another particle is projected with velocity `20(sqrt2) m//s` at `45^@`. `(g = 10m//s^2)`
(a) What is acceleration of first particle relative to the second?
(b) What is initial velocity of first particle relative to the other?
(c) What is distance between two particles after 2 s?

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