A net force of 15 N is exerted on an encyclopedia to cause it to accelerate at a rate of 5m/s/s. Determine the mass of the encyclopedia

a=5m/sF=15Nby the formula, F = m × a15N = m × 5m/sm = [tex] \frac{15}{5}
[/tex]             By simplification(division), m = 3Thus, mass of the Encyclopedia will be 3kgs.All the Best. :D