A body of mass 120g placed at the 10cm mark on a uniform metre rule makes the rule settle horizontally on a fulcrum places at 35cm mark. Calculate the mass of the rule
A
60g
B
80g
C
120g
D
200g
Verified Correct Answer: D.
Physical Principles & Numerical Solution
m = \(\frac{25 \times 120}{15}\)
= 200g
Source: Myschool Past Questions Archive (Record #35434)