A 75kg painter stands on a 5.5m long uniform plank resting on a scaffold. If the

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A 75kg painter stands on a 5.5m long uniform plank resting on a scaffold. If the plank's mass is 20kg, how close to the left end of the plank can he stand without tipping the plank? (The scaffold supports are 2.5m apart, and the plank extends beyond the scaffold supports, 1.5m on each end.)

A 75kg painter stands on a 5.5m long uniform plank resting on a scaffold. If the plank's mass is 20kg, how close to the left end of the plank can he stand without tipping the plank? (The scaffold supports are 2.5m apart, and the plank extends beyond the scaffold supports, 1.5m on each end.)

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