Question #110541

a cylindrical drum has radius r and weight W. the drum is to be rolled over onto a step of height r/2 by a horizontal force F applied to the top of the drum

what is the minimum force F required for the drum to start rolling on the step?

what is the minimum force F required for the drum to start rolling on the step?

Expert's answer

"F(r-h)=W\\sqrt{r^2-(r-h)^2}"

"h=0.5r"

"F(r-0.5r)=W\\sqrt{r^2-(r-0.5r)^2}"

"F(0.5r)=W\\sqrt{0.75r^2}"

"F=\\sqrt{3}W"

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## Comments

Athar28.04.20, 06:04The perpendicular distance between top of drum and pivot point isn't be 2r-h

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