Mechanics Quiz
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Questions and Answers

What is the moment of a force about a point?

  • The division of the force and the perpendicular distance of the line of action of the force from that point
  • The product of the force and the perpendicular distance of the line of action of the force from that point (correct)
  • The subtraction of the force and the perpendicular distance of the line of action of the force from that point
  • The sum of the force and the perpendicular distance of the line of action of the force from that point

What is the SI unit of moment?

  • m/s (meters per second)
  • Nm (Newton meter) (correct)
  • J (Joule)
  • kg (kilogram)

How is the tendency of a force to rotate the body in the anti-clockwise direction about a point described?

  • Anti-clockwise moment (correct)
  • Clockwise moment
  • Opposite moment
  • Neutral moment

What happens if clockwise moment is taken as negative?

<p>The anti-clockwise moment will be positive (B)</p> Signup and view all the answers

What is the resultant moment of forces about a point?

<p>The vector sum of the moments of the individual forces about that point (D)</p> Signup and view all the answers

What is the formula for calculating the moment (M) of a force (F) about a point O?

<p>The moment (M) of a force F about point O is given by the formula $M = F \cdot r$, where F is the force and r is the perpendicular distance from point O on the line of action of force F.</p> Signup and view all the answers

What is the SI unit of moment?

<p>The SI unit of moment is Nm (Newton meter).</p> Signup and view all the answers

How is the tendency of a force to rotate the body in the clockwise direction about point O described?

<p>The tendency of the force to rotate the body in the clockwise direction about point O is referred to as a clockwise moment.</p> Signup and view all the answers

How is the tendency of a force to rotate the body in the anti-clockwise direction about point O described?

<p>The tendency of the force to rotate the body in the anti-clockwise direction about point O is referred to as an anti-clockwise moment.</p> Signup and view all the answers

What is the formula for calculating the resultant moment of forces F1, F2, and F3 about point O?

<p>The resultant moment (R) of forces F1, F2, and F3 about point O is given by the formula $R = M1 + M2 + M3$, where M1, M2, and M3 are the individual moments of forces F1, F2, and F3 about point O.</p> Signup and view all the answers

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