Question text
13 A long plank is pivoted at its centre of gravity. Two objects, X and Y, are then placed on the plank. X has a weight of 140N and is 1.2m to the left of the pivot. Y has a weight of 220N and is 0.55m to the right of the pivot. A third object of weight 110N is placed on the plank so that the plank is in equilibrium. On which part of the plank is the object placed? 1.2 m 0.55 m X Y plank pivot 140 N 220 N A B C D
13 A long plank is pivoted at its centre of gravity.
Two objects, X and Y, are then placed on the plank.
X has a weight of 140N and is 1.2m to the left of the pivot. Y has a weight of 220N and is 0.55m
to the right of the pivot.
A third object of weight 110N is placed on the plank so that the plank is in equilibrium.
On which part of the plank is the object placed?
1.2 m 0.55 m
X Y
plank
pivot
140 N 220 N
A B C D
Select your answer: