Force acting on a particle is 5 N. If units of length and time are doubled and unit of mass is halved then find the numerical value of force in the new system of units.

Force =5 N=5 kg·ms2If unit of length and time are doubled and the unit of mass is halved.Then unit of force will be 12×2(2)2=14times.Hence the numerical value of force will be 4 times or answer is 20.