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JEE Main Physics question

PhysicsMotion in a PlaneJEE Main

Three particles start from the origin at the same time, one with a velocity along the -axis, the second along the -axis with a velocity , and the third along the line. The velocity of the third particle so that the three may always lie on the same line is

Answer: (B)

Solution

Positions at time : particle 1 at , particle 2 at , particle 3 at (speed along ). The line through particles

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Question ID VK-152031