In a series of controlled experiments, a student measures the force acting on a go-cart and the go-cart's acceleration. The student's data are shown below. Based on the recorded observations, what is the mass of the go-cart in kilograms?

The mass of the go-cart in kilograms : 20 kg

Newton's 2nd law explains that the acceleration produced by the resultant force on an object is proportional and in line with the resultant force and inversely proportional to the mass of the object  

F = force, N  

m = mass = kg  

a = acceleration due to gravity, m / s²  

Maybe the student's data are shown in the attachment

So,  the mass of the go-cart :

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the potential energy of the reactants is 200j.

from the energy diagram, the energy of the product formed is 350j; this means that, this reaction is an endothermic reaction, because it absorbs energy from its environment.