To solve the problem we must know about Force.
A force is given as the product of mass and acceleration.
[tex]\rm{Force = mass\times acceleration[/tex]
Acceleration is the rate of change of velocity per unit time. It is given as,
[tex]\rm{ Acceleration = \dfrac{v-u}{t}[/tex]
The mass of the child is 33 kg.
Explanation
Given to us
[tex]\rm{Force = mass\times acceleration[/tex]
[tex]66\ N = mass \times 2\\\dfrac{66}{2}= mass\\mass =\dfrac{66}{2}\\\\mass= 33\ kg[/tex]
Hence, the mass of the child is 33 kg.
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