Que 1 : A heave mass is hanging from a string in equilibrium without breaking it . When this same mass is set into oscillations , the string breaks . Explain ?

 

Que 2 : After a good meal at a party u wash ur hands and find that u hav forgotten to bring ur handkerchief . U shake ur hands vigorously to remove ht ewater as much as u can .Why is water removed in this process ???

 

Pls post solutions with explanation !!!!!!

A1>> 

 

When the mass is hanging from the string the only tension in the string is the weight. When the mass is set into oscillations, there is a centrifugal force acting and also the weight. This net tension becomes greater than the breaking strenght of the string and so the string breakes.

 

 

A2>>

 

Water gets evaporated in this process as on shaking the hands vigorously the water gains the neccssary amount of energy required for it to evaporate.

Hi anshuman !

yes , ur explanation is right for both que 1 and 2 , but for que -2 , I hav my own explanation , Can we answer this problem by inertia ???

Also , this que is from the ch - circular motion . So , I need a ans. using those concepls .