Question

The resultant of two forces 2p and root 2p is root 10p the angle between the forces is

Answer 1

Explanation:

=>Resultant force = [(f1)^2+ (F2)^2+2f1f2cosx]^1/2

=>(10p)^1/2 = [(4p^2)+(2p^2)+4(2^1/2)p^2*cosx] ^1/2

=>10p^2= 6p^2+4(2^1/2)p^2cosx

=>p^2= (2^1/2)p^2cosx

=>cosx=1/(2^1/2)

=>x=45°