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A particle of mass m attached to the end of string of length l released from horizontal position . The particle rotates in circle about o as shown. When it is vertically below o the string makes contact with nail N placed below o at a distance h and rotates around it . For particle to swing completely around nail in a circle , A)h B)h>_3/5l C)h D)h>_2/5l
speed requiredv and velocity well ball reached bottom = so2*g*l 5*g(l-h)h (3/5)*lHope it clears...................................................
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