Question

Three like parallel forces of 20 N,

30 N and 40 N act at a distance 1m

apart from each other. Their

resultant acts at a distance of

………………….. from 20 N force

1. 0.25 m 2. 0.6 m 3. 1 m 4. 1.2 m
​

Answer 1

Answer:

Explanation:

Correct option is A)

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