Two particles 1 and 2 are thrown in the directions shown in figure simultaneously with velocities 5 m/s and 20 m/s. Initially, particle 1 is at height 20 m from the ground. Taking upwards as the positive direction, find the acceleration of 1 with respect to 2?

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answer is D.

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Detailed Solution

a1=a2=-g ∴ a12=a1-a2=0

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