Question

Calculate the difference of anticlockwise and clockwise moments

• A. $0gf$ $cm$
• B. $10gf$ $cm$
• C. $1000gf$ $cm$
• D. $100gf$ $cm$

Answer 1

The correct option is C $1000gf$ $cm$

The turning effect of a force is known as the moment. It is the product of the force multiplied by the perpendicular distance from the line of action of the force to the pivot or point where the object will turn. That is, Moment = Force * distance.
If the moment of a force turns or rotates the body in anti-clockwise direction, then it is called anti-clockwise moment.
If the moment of a force turns or rotates the body in clockwise direction, then it is called clockwise moment.
In this case, the weight of 150 gf at the distance of 40 cm from the center point O, rotates the ruler in the anticlockwise direction and the weight of 250 gf at the distance of 20 cm from the center point O, rotates the ruler in the clockwise direction.
Therefore,
$Anticlockwisemoment=150gf\times 40cm=6000gf$
and the
$Clockwisemoment=250gf\times 20cm=5000gf$.
The difference between the anticlockwise and the clockwise moments is given as 6000 gf - 5000 gf = 1000 gf.
Hence, the difference of anticlockwise and clockwise moments is 1000 gf.