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Solution


Q.

A ball of mass 0.5 kg is attached to a string of length 50 cm. The ball is rotated on a horizontal circular path about its vertical axis. The maximum tension that the string can bear is 400 N. The maximum possible value of angular velocity of the ball in rad/s is          [2024]
1 1600  
2 40  
3 1000  
4 20  

Ans.

(2) 

      T=mω2R

       400=12×ω2×12⇒ω2=1600

       ω=40 rad/sec