Lecture 4 Biomechanical Principles: Newton's 3rd Law

Question 1

Newton’s 3rd law is…

Answer 1

Law of Action-Reaction

Question 2

The Law of Action-Reaction states that..

Answer 2

“For every force there is an equal and opposite directed force” (linear)
“For every torque there is an equal and opposite directed torque” (angular)

Question 3

Walking example: Foot produces force against the ground and the ground produces ground reaction force in ________ direction with ______ magnitude

Answer 3

• opposite

- equal

Question 4

In the walking example, If horizontal force of the ground is less than the horizontal force applied by the foot, then the foot would _________ according to Newton’s law

Answer 4

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