Question

Two particles start moving at t= 0 from the same point in a gravity free space, with equal speeds v directed respectively
along the x and the y axes. If a third particle starts moving simultaneously from the same point along a straight line in the x- y plane inclined at an angle of 45° with the X axis such that all the three remain collinear for all values of t, then the speed of the third particle will be
a-2v
b-v/√2
c-√2v​

Answer 1

Answer:

correct answer is option B

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