X=3t2+2 1- determine the position of m at t0=0s
t1=1s , t3=ts
2-dispalcement between t0 and t3
3-distance covered between t0 and t3

potential energy is directly proportional to height.

more height = more potential energy.

greatest increase in height = greatest increase in potential energy

where are the points with the greatest increase in height ?

has to be c-e or d-e .

continuous conducting path for current, power supply

because if the tool that you are using is not balanced it there would be false mass.