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Mechanics help

I don’t get why friction acts with tension for block m. Can someone explain this question to me step by step 😭🥹IMG_2477.jpegIMG_2478.jpeg
(edited 11 months ago)
Reply 1
The maximum mass for m (in equilibrium) will occur just when m is on the verge of moving down the plane. Hence the friction (opposing motion) must act up the plane for m.
(edited 11 months ago)

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