Question

A uniform meyre rule of mass 130g is pivoted at the 55cm mark. An object of mass 20g is used to balance the metre rules horizontally. Calculate the distance of the object from the pivot

Answer 1

To calculate the distance of the object from the pivot, you can use the principle of moments. Plugging in the given values, the distance of the object from the pivot is calculated to be 357.5 cm.

Step-by-step explanation:

To calculate the distance of the object from the pivot, we can use the principle of moments. The principle states that the anticlockwise moments are equal to the clockwise moments. In this case, the moment of the object about the pivot is equal to the moment of the meter rule about the pivot.

Moment of the object = Moment of the meter rule

Mass of object x Distance of object from pivot = Mass of meter rule x Distance of meter rule from pivot

Plugging in the given values:

(20g)(Distance of object from pivot) = (130g)(55cm)

To find the distance of the object from the pivot, divide both sides of the equation by 20g:

Distance of object from pivot = (130g)(55cm) / 20g

Calculating this, we get:

Distance of object from pivot = 357.5 cm