Question

The resultant of two forces acting at a point at right angles to each other is 40 pounds. If the horizontal force is 30 pounds what is the other force?​

Answer 1

10√7 pound

Explanation:

R = √A² + B² + 2ABcos∅

=> 40 = √30² + B² + 2ABcos0°

=> 40² = 30² + B² + 0

=> 1600 - 900 = B²

=> √700 = B

=> 10√7 = B

Note that if R = 50*, B = 40 pounds