Arnold K H Tan's answer to T's Secondary 4 E Maths Singapore question.

done {{ upvoteCount }} Upvotes
clear {{ downvoteCount * -1 }} Downvotes
Arnold K H Tan
Arnold K H Tan's answer
2165 answers (A Helpful Person)
1st
Recall that a moment of force = force x perpendicular distance (from the direction of the force) to the pivot