Question

31. A body is projected vertically upward with speed
10 m/s and other at same time with same speed
in downward direction from the top of a tower. The
magnitude of acceleration of first body w.r.t. second
is {take g = 10 m/s2)
(1) Zero
(2) 10 m/s2
(3) 5 m/s2
(4) 20 m/s2
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Answer 1

the answer is 10 m /s2

so easy answer