Question 4

A horizontal plank, 6.00 m long and weighing 200 N, rests on two supports placed 1.20 m from each end. A carpenter who weighs 800 N walks along this plank. How close can he go to the end of the plank without upsetting it? (The plank is a uniform plank.)

• A.    0.75 m
• B.    2.25 m
• C.    3.00 m (he must stand on the center of the plank)
• D.    Insufficient information
• E.    Not close to any of the above

Formula Sheet

Question 3

Question 5

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