ICSE Class 6 Answered
Numericals:-
A see-saw of length 4 N is supported at its center. A boy weighing 4 N sits at a distance of 1 M from the see-saw .where should a girl weighing 2 N sit (on the other side of the see-saw) so as to balance the weight of the boy?
Asked by rajinder.rs758 | 26 Sep, 2018, 08:41: PM
Expert Answer
See-saw is an example of lever.
We know that according to the principle of lever,
load x load arm = effort x effort arm
4 N x 1m = 2 N x effort arm
Thus, effort arm = 2 m
Hence, a girl must sit at a distance of 2 metre so that the see-saw will get balanced.
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