A stone of mass 0.3 kg tied to the end of a string in a horizontal plane in whirled round in a circle of radius 1 m withp. speed of 40 rev/min. What is the tension in the string ? What is the maximum speed with which the stone can be whirled around if the string can withstand a maximum tension of 200 N ?

A stone of mass 0.3 kg tied to the end of a string in a horizontal pla

1.	A stone of mass 0.3 kg tied to the end of a string in a horizontal plane in whirled round in a circle of radius 1 m withp. speed of 40 rev/min. What is the tension in the string ? What is the maximum speed with which the stone can be whirled around if the string can withstand a maximum tension of 200 N ?
Answer» Solution :`T_("MAX") = mv_("max")^(2)//r, v_("max") = sqrt(200//0.3) = 25.8 MS^(-1)`