An object of mass 15kg is at the point of sliding down a plane inclined at 36° to the horizontal. Find the least force parallel to the plane required to make the object to begin to up the plane (g=10m/s2)
If there is no friction then
"F=mg\\sin36\u00b0=15\\cdot9.81\\cdot\\sin36\u00b0=86.5\\ (N)" . Answer
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