Question

The square pf resultant of two equal forces is three times their scaler product. Angle between the forces is :

Answer 1

Let the forces be a and b.

Given that, R=3A^2

now,

R^2=A^2+B^2+2ABcostheta

=>2A^2+2A^2 costheta

pitting the value R=3A^2

so,

3A^2=2A^2+2A^2costheta

solving this,

theta= 60 degree.

HAPPY TO HELP