8. If the happy student in the previous problem receives another duck of mass 1.0 kg (they now have 3 ducks), and they put the new duck at the front of the row, find:

a) the acceleration of the three ducks. (1.2 m/s²)

b) the tension in the string connecting ducks 1 and 2. (8.8 N)

c) the tension in the string connecting ducks 2 and 3. (2.5 N)

the previous problem is

Two toy ducks, attached to each other by a string, are being pulled by a very happy student who just got them as a graduation present. The front duck is 5.0 kg and the back duck is 2.0 kg. If the happy student pulls them with a force of 10 N, and there is no friction, calculate: