equilibrium?

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a light plank(weightis assumed negligible)10.0m long is projecting over the edge of a building with 2.0m of its length protuding. how far out along the protruding part can a person of mass 124kg walk before the beam titlts, if there is an object of mass 18kg on the other end of the plank. show working out

2007-04-29 21:34:35 · 2 answers · asked by moonlight123 1 in Science & Mathematics ➔ Physics

2 answers

The moments must be equal:

8 m *18g N = 124g N *D m

so D = 1.16 m

2007-04-29 21:37:47 · answer #1 · answered by Anonymous · 1⤊ 0⤋

124x = 18*8 = 144
x = 1.161 m

2007-04-30 04:52:37 · answer #2 · answered by Helmut 7 · 0⤊ 0⤋