One end of a string of length l is connected to a particle of mass m and the other to a small peg on a smooth horizontal table. If the particle moves in a circle with speed v the net force on the particle (directed towards the center) is:
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NEET MCQ Books for XIth & XIIth Physics, Chemistry & BiologyA stone of mass 0.25 kg tied to the end of a string is whirled around in a circle of radius 1.5 m with a speed of 40 rev/min in a horizontal plane. The tension in the string is:
(1) 5.6 N
(2) 6.6 N
(3) 3.4 N
(4) 4.2 N
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NEET MCQ Books for XIth & XIIth Physics, Chemistry & Biology