Final answer:
An external force is generated outside the system but acts on an object inside the system, while an internal force acts between objects within the system. The given statement that an HSM is external while a TMP is internal is true.
Step-by-step explanation:
An external force is defined as a force generated outside the system of interest that acts on an object inside the system. This means that the force originates from outside the system but has an effect on an object that is part of the system. On the other hand, an internal force is a force that acts between objects within the system.
For example, if you have a book placed on a table, the weight of the book is an external force because it is acting on the book from outside the system (the table and the book's surroundings). However, if the book is pressing against the table with a certain force, that would be an internal force because it is acting between the book and the table.
Based on this explanation, the statement that an HSM (external) is external while a TMP (internal) is internal is true.
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