Question

what is external forces, explain with examples
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Answer 1

Answer:

For our purposes, we will simply say that external forces include the applied force, normal force, tension force, friction force, and air resistance force. And for our purposes, the internal forces include the gravity forces, magnetic force, electrical force, and spring force.

Answer 2

Answer:

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.