Sun April 06, 2014 By: Sangeeta Mandal


Expert Reply
Mon April 07, 2014
The two particles are initially moving horizontally in opposite directions.
Let v1x = -1 m/s along -x-axis, and v2x = 1 m/s along +x-axis.
Their initial velocities in the y-direction is zero.
Let us say that after time 't' their velocity vectors become mutually perpendicular to each other.
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