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The sum of the kinetic and potential energies of a system of objects is conserved only when no external force acts on the objects.
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Conservation of mechanical energy</h3>
The principle of conservation of mechanical energy states that the total mechanical energy of an isolated system (absence of external force) is always constant.
M.A = P.E + K.E
where;
P.E is potential energy
K.E is kinetic energy
Thus, the sum of the kinetic and potential energies of a system of objects is conserved only when no external force acts on the objects.
Learn more about conservation of mechanical energy here: brainly.com/question/24443465
A high tide means when the water has risen and is higher up(closer to high up land). Low tide is when it’s receded
