a meter rule is found to balance at the 48cm mark when a body of 60g is suspended at the 6cm mark the bal point shift to the 30cm mark what is the mark of the meter rule?

To find the balance point of the meter rule, we can use the principle of moments.

Let the balance point be x cm from the 0 cm mark.

The moment of the 60g body at the 6cm mark is given by:
60g x 6cm

The moment of the meter rule at the balance point x cm is given by:
x cm x 100g (since the meter rule has a mass of 100g)

According to the principle of moments, the total anticlockwise moment is equal to the total clockwise moment.

Therefore, we have:
60g x 6cm = x cm x 100g

Rearranging the equation, we get:
60g x 6cm / 100g = x cm
x = 3.6 cm

Therefore, the balance point of the meter rule is at the 3.6 cm mark.