A uniform metre rule of mass 90g is provided at the 40cm mark. If the rule is in equilibrium with an unknown mass m placed at the 10cm mark and a 72g mass at the 70cm mark, determine m

Gshock2020

6 years ago

Sum of clockwise forces about a point is equal to the sum of anticlockwise moments about the same point with this we can solve the anticlockwise moment is m*10 while the clockwise moment is 90*10+72*30
with this we equate and make m the subject

Benaiah2

2 years ago

This question needs to be reviewed
i believe the answer is not even present
The clockwise forces are (72×30)+(90×60)