A bar AB is balanced horizontally on two knife edges as illustrated as in the diagram above. Determine the weight of the bar.
- 10.0N
- 20.0N
-
40.0N
- 50.0N
The correct answer is: C
Explanation
Upward force = downward force = weight of the Bar
20N + 20N = Weight of the BAR
Therefore, the weight of the bar = 40N