Wave Optics - Text Book MCQ 7 with Solution | Class XII Physics | Tamil Nadu State Board

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Physics Lectures by P.SARAVANAN

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Good evening sir,

Sir alakh pandey sir has said something in his video which I am not able to understand that

"How can rolling without slipping occur without friction? In reality, rolling without slipping can't happen without friction. It can happen if some other force is applied, but in normal life, it can't be achieved without friction." he said that rolling without slipping can be achieved even without friction if some other external force is applied but i am thinking that how without friction external force will works .
He said that that koi aur force laga dete..

please explain me sir that what he want to say..
How it is possible
What he want to say
Please explain me sir 🙏

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