Physics 5054 · O Level · Turning effect of forces

Turning effect of forces — practice question

The diagram represents a muscle and the bones in a person’s arm. The hand is supporting a load with weight $40\,\text{N}$. The elbow serves as the pivot, and the muscle tension keeps the forearm horizontal. What is the tension in the muscle caused by the load?

  • A$200\,\text{N}$
  • B$240\,\text{N}$
  • C$280\,\text{N}$
  • D$1400\,\text{N}$

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