A uniform bar AB is balanced on a knife-edge wh... - WAEC Physics 2015 Question
A uniform bar AB is balanced on a knife-edge which is 60cm from B by a mass of 22g which hangs at C 10cm from A. Calculate the mass of the bar.
A
133.2g
B
66.0g
C
60.0g
D
22.0g
correct option: b
clockwise movement = anticlockwise movement
w x 10 = 22 x 30
w = (\frac{22 \times 30}{10})
w = 66.0g
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