Suppose two children push horizontally, but in exactly opposite directions, on a third child in a wagon. The first child exerts a force of 72.0 N, the second a force of 86.0 N, friction is 11.0 N, and the mass of the third child plus wagon is 23.0 kg.
(a) Calculate the acceleration in m/s2. (Enter the magnitude.)
(b) What would the acceleration be (in m/s2) if friction were 14.0 N? (Enter the magnitude.)
