Question

A force of 180 newton and force of 350 newton acts simuntaneously at a point. Find the resultant of the forces if angle 135

Answer 1

Resultant force

= Sqrt(A² + B² + 2ABcos theta)

= Sqrt( 180² + 150² + 2×180×150×cos 135)

=Sqrt( 180² + 150² - 2×180×150×cos45)

=Sqrt( 180² + 150² - 2×180×150×1/√2)

=Sqrt(32400+22500- 38178)

=Sqrt(16722)

=129.31 N