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A small stone of mass 0.4 kg tied to a m...

A small stone of mass 0.4 kg tied to a massless inextensible string is made to loop the loop Radius of the path is 4 m. Find its speed at the highest point. How would this speed change if mass of the stone is decoreased by `10%? (g =10 ms^(-2)).`

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Speed at highest point `=sqrt(gr)=sqrt(10xx4)=6.32ms^(-1).` It does not depend on the mass of the stone. So, this speed remains the same on changing mass of the stone.
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AAKASH INSTITUTE-WORK, ENERGY AND POWER-Assignment (SECTION - D)
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  4. A : Internal forces can change the kinetic energy but not the momentum...

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  5. A : The potential energy can be defined only in conservative field. ...

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  8. A : During collision between two objects, the momentum of colliding ob...

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  10. A : In inelastic collision, a part of kinetic energy. convert into hea...

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  11. A : Energy dissipated against friction depends on the path followed. ...

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