3] A force of 6 N and another of 8 N can be applied together to produce the effect of a single force of:(a) 1 N(b) 11N(c) 15 N(d) 20N

maximum value of net force = F_max = A+B = 8+6=14N

minimum value of net force = F_min = A-B = 8-6 = 2

         14 = >  F > = 2

force can take value bw 2 & 14 , so option b) is correct....

The maximum value would be 8+6=14N and the minimum would be 8-6=2N.

Hello Student

Here,
Maximum value of Net force = F_max ​= A+B
= 8 + 6 =14N
Minimum value of Net force = F_min ​= A−B
= 8 − 2 = 2N
∴ Force can take value as14>F>2
Thus,11N might be the force.

I hope this answer will help you.