Question

A ball is projected with a velocity (3 hat i +4 hat j )ms^ -1 The time after which its velocity vector is normal to intial velocity vector is ( g=10m/s^ 2 )
(A) ( 0.625 s
(B) 0.4 s
(C) 0.833 s
(D) 0.125 s​

Answer 1

Answer:

Option B is the correct answer OK

Answer 2

Answer:

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