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 Answer: Option B
Explanation
clockwise movement = anticlockwise movement
w x 10 = 22 x 30
w = (frac{22 times 30}{10})
w = 66.0g