Two forces are acting at an angle of 120. The bigger force is 40n and the resultant is perpendicular to the smaller one. The smaller force is

The smaller force is 20 Newtons.Let, the magnitude of the smaller force be F Newton.Now, the resultant force makes an angle of 90° with the smaller force. So, the angle between the resultant force and the larger force = (120° - 90°) = 30°.So, tan 30° = (F * sin 120°) / (40 + F * cos 120°)(1 / √3) = {F * (√3) / 2} / {40 + F * (- 1 / 2)}80 - F = 3F4F = 80F = 20.So, the magnitude of the smaller force is 20 Newtons.Learn more about force at:https://brainly.com/question/25239010