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A velocity vector (5m/s) is making and angle of 60 degrees with X axis has a horizonal component of magnitude ___(a) 2.5(b) 5.5(c) 5(d) 10/√3This question was posed to me in a job interview.This intriguing question originated from Motion in a Plane topic in chapter Motion in a Plane of Physics – Class 11

Answer»

The correct answer is (a) 2.5

Easy explanation: The HORIZONTAL component of any vector with magnitude a is a COS θ. Here θ = 60. cos θ = ½. HENCE the answer is 5/2 = 2.5 m/s.



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