Question

a like parallel force sysstem consist 4 forces of magnitude 10 N, 20N, 30N, 40N acting at 0.2 m apart from each other position or resultant from 1st force 10 N is?
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Answer 1

Answer:

Consider the point at which resultant of the forces will act, is 'x' m from the point A.

Thus the point is (1.5 - x) m far from the point B.

Thus, using the formula Torque = Distance x Force acting

20x=30(1.5−x)

or,2x=4.5−3x

or,5x=4.5

or, x=0.9mor90cm

Thus the resultant point will be 0.9 m or 90 cm far from point A

Answer 2

a)0.4

b)0.6

c)0.2

d)0.1

ans=0.4