Question

Which produces a greater moment, a force of $10N$ with a lever arm of $3m$ or a force of $8N$ with a lever arm of $4m$?

• A. The lever with 10 N force
  
• B. The lever with 8 N force
  
• C. Both produce the same amount of moment
  
• D. None of these
  

Answer 1

The correct option is B The lever with 8 N force

Torque of a $10N$ force ${\tau }_1=r\times F=3\times 10=30Nm$

Torque of a $8N$ force ${\tau }_2=r\times F=4\times 8=32Nm$

Thus lever with $8N$ force produces greater torque (or moment).