Determine the force P needed to pull the roller

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Determine the force P needed to pull the 50-kg
roller over the smooth step. Take u = 30°.
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Thank you so much! You saved my life! I wondered how the writer used the momentum over B to get the result.

nasrinsam
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What to do for pushing?Should we take normal 0 for that case too?

RashmiPai-rubr
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Sir pls send the link of all videos of this book 🙏🏼

esandeep