Question

Two forces of 10kg and 15 kg act at a point. If the angle between them is 30 degree, then find the value of the resultant of the two forces

Answer 1

It should be 10 N and 15N

Resultant force

= Sqrt(A² + B² + 2ABcos theta)

= Sqrt(10² + 15² + 2×10×15×cos 30)

= Sqrt(10² + 15² + 2×10×15×√3/2)

= Sqrt(100+ 225 +259.8)

= Sqrt(584.8)

= 24.183 N