WAEC - Physics (2011 - No. 10)
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
60g
80g
120g
200g
Giải thích
m = \(\frac{25 \times 120}{15}\)
= 200g
= 200g