Force is too large for a person to exert.
Explanation:
m = Mass of child = 14 kg
u = Initial velocity of compartment = 64 mi/h =
v = Final velocity of compartment = 0
t = Time taken by the compartment to stop = 0.05 s
Force is given by
The person has to exert a force of in the opposite direction to keep holding the child. This is a huge amount of force and cannot be done by a person's physical strength alone.