7.A particle of mass m is under the influence of a force F which varies with the displacement x according to the relation

A particle of mass m is under the influence of a force F which varies with the displacement x according to the relation F= -kx+F_º in which k and F_º are constants. The particle when disturbed will oscillate

(a)   about  x=0, with ω≠√k/m

(b)   about  x=0, with ω=√k/m

(c)   about  x=F_º/k, with ω=√k/m

(d)   about  x=F_º/k, with ω≠√k/m

Answer-c

(7)