<span>forces do not cancel out because they act on different bodies </span>
<span>also the forces acting on the horse is not just the force he exerts on the wagon </span>
<span>he also applies force on the ground so the static friction on the ground helps the horse move forward </span>
<span>forces acting on the horse are friction in its direction of motion and the tension opposing motion </span>
<span>if the surface has enough friction he can always move</span>
Legislative: Make laws.
Executive: Enforce the laws.
Judicial: Interpret the laws.
<span>I believe the answer is: In a controlled and unstable environment at slower speeds
Controlled environment refers to exercies places with full safety regulations intact in order to avoid fatal accidents. The 'slower speed'in this context does not necessarily mean always do low level workout, but we need to maintain our workout level only to reach 70& - 80% intensity most of the time in order to prevent injuries that might mess up your workout schedule.
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