Physics 5054 · O Level · Turning effect of forces

Turning effect of forces — practice question

A crane carries a $5800\,\text{N}$ counterweight, placed $2.3\,\text{m}$ from the tower on a horizontal jib. The centre of gravity $P$ of the crane jib is shown. What horizontal distance must separate the $2300\,\text{N}$ load from $P$ for the moment about $P$ to be zero?

  • A$0.91\,\text{m}$
  • B$3.5\,\text{m}$
  • C$5.8\,\text{m}$
  • D$8.1\,\text{m}$

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