Wed October 26, 2011 By:
On a frictionless horizontal surface , assumed to be x-y plane , a smal trolley A is moving parallel to y axis is at (3,3),with a constant velocity of {(3^(1/2)) - 1 } m/s ,,


Expert Reply
Wed November 09, 2011
As ball will hit A, it appears to A that ball is moving towards A from O. thus apparent angle will be 45o.
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