4) B
Pivot is located in the middle. So ignore the weight of the bar.
Moments clockwise = Moments anticlockwise:
(500 x 0.2) = (0.4 x 200) + 200x
100 = 80 + 200x
x = 20 ÷ 200 = 0.1m = 10 cm
4) B
Pivot is located in the middle. So ignore the weight of the bar.
Moments clockwise = Moments anticlockwise:
(500 x 0.2) = (0.4 x 200) + 200x
100 = 80 + 200x
x = 20 ÷ 200 = 0.1m = 10 cm