Test yourself 18 A seesaw has a weight of 40 N placed 1 m from the pivot and a weight of 20N is placed on the opposite side of the pivot at a distance of 2 m from the pivot. Is the seesaw balanced?
Test yourself 18 A seesaw has a weight of 40 N placed 1 m from the pivot and a weight of 20N is placed on the opposite side of the pivot at a distance of 2 m from the pivot. Is the seesaw balanced?
Answer:
yes, yes it is ;)
Explanation:
For a body to be balanced, the sum of anti-clockwise moments must be equal to the sum of clockwise moments! In this case, there are only 2 objects weighing down on the seesaw. Both at certain distances from the pivot of the seesaw.
With the formula; Moments = Force × Distance, we can calculate the moment for these two objects.
1st object with the force of 40N and at a distance of 1m away from the pivot would have a moment of 40Nm.
2nd object with the force of 20N and at a distance of 2m away from the pivot would also have a moment of 40Nm.
Therefore, the seesaw is balanced due to the equal moments produced by both objects.
I hope this helps, let me know if I have any misconceptions etc huhu
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