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Sahay Sir > Question Answers > NCERT Exemplar Class 11 > Physics > Chapter 4 - Laws of Motion > A stone of mass 0.25kg tied to the end of a string is whirled round in a circle of radius 1.5m with speed 40rev/min in a horizontal plane. What is the tension in the string and what is the maximum speed with which the stone can be whirled around, if the string can withstand a maximum tension of 200N?

A stone of mass 0.25kg tied to the end of a string is whirled round in a circle of radius 1.5m with speed 40rev/min in a horizontal plane. What is the tension in the string and what is the maximum speed with which the stone can be whirled around, if the string can withstand a maximum tension of 200N?

A shell of mass 0.020kg is fired by a gun of mass 100kg. If the muzzle speed of the shell is 80m/s. what is the recoil speed of the gun?