Question

what are external forces​

Answer 1

Explanation:

External forces are forces caused by external agent outside of the system. Internal forces are forces exchanged by the objects in the system. To determine what part should be considered external and internal, mechanical system should be clearly defined.

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Answer 2

Ans= External forces are forces resulting from the interaction between human body and its environment. External forces can be divided into contact forces and non-contact forces. Most forces that biomechanics works with are contact forces. Contact forces are forces that act at the point of contact between two objects.