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Grade 11IIT JEE Entrance Exam

two staight lines l1 and l2 cross each other at point p . the line l1 is moving at a speed v1 perpendicular to itself and the line l2 is moving at a speed v2 in the similar fasion . the speed of point p is.

Ashritha

7 Years agoGrade 11

1 Answer

Pooja

7 Years ago

Suppose line l₁ is oriented horizantally and it's velocity v₁ is in vertical direction

Similarly , line l₂ is oriented vertically and it's velocity v₂ is in horizontal direction

At point where they cross it will have both horizontal and vertical components of velocity.
So net velocity,

V = (v₁² + v₂²)^1/2

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